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Add Docker build for browser mode with optimized 3-stage build, multi-platform support, comprehensive UI testing, one-click deployment, enterprise SSO integration, and biweekly CI pipeline (#934)

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## Docker Build for Browser Solution

This PR creates a Docker build for the browser solution (MQTT Explorer
server mode).

### Completed:
- [x] Create a production Dockerfile for the browser solution
(`Dockerfile.browser`)
  - **NEW**: 3-stage build for maximum optimization
- **NEW**: Clean production dependency installation with `yarn
--production`
  - **NEW**: Only compiled dist/ folder copied (no source code)
  - Alpine Linux base with Node.js 24
  - Non-root user (UID 1001) for security
  - Health check endpoint with proper error handling
  - Proper signal handling with dumb-init
  - Production dependencies automatically filtered by yarn
- [x] Apply Docker best practices (multi-stage build, minimal image,
non-root user, .dockerignore)
  - Created comprehensive .dockerignore
  - **FIXED**: Removed events from .dockerignore (needed for build)
  - **NEW**: Optimized for smaller layers with combined RUN commands
  - **NEW**: Removed development dependencies from final image
  - Used alpine base image
- [x] Create GitHub Actions workflow for building, publishing, and
testing the Docker image
  - Builds for linux/amd64, linux/arm64, linux/arm/v7
- **FIXED**: Added tsconfig.json and events/** to workflow trigger paths
- **FIXED**: Attestation now uses correct digest from build step output
  - **NEW**: Mosquitto MQTT broker service for integration testing
- **NEW**: MQTT broker configurable via MQTT_BROKER_HOST and
MQTT_BROKER_PORT environment variables
  - **NEW**: Full UI test suite runs against containerized application
- Tests container startup, health check, HTTP response, data persistence
  - **NEW**: Image size reporting in workflow summary
  - Tests verify application works with MQTT broker
- Publishes to GitHub Container Registry
(ghcr.io/thomasnordquist/mqtt-explorer)
  - Includes build attestation for supply chain security
- [x] Configure workflow to run on push and every two weeks via cron
schedule
  - Runs on 1st and 15th of each month at 2:00 AM UTC
- Also runs on push to master/beta/release branches when relevant files
change
  - Manual trigger via workflow_dispatch
- [x] Add comprehensive test suite
- Basic smoke tests: startup, health check, HTTP response, data
persistence
- **NEW**: Full UI test suite (`test:browser`) runs against Docker
container
- **NEW**: Tests connect to configurable MQTT broker (default
localhost:1883)
- Tests execute with Mosquitto MQTT broker available for backend
integration
  - Same comprehensive tests validate both Electron and browser modes
- [x] Test organization and naming
- **NEW**: Renamed `test:ui` to `test:electron` for Electron-specific
tests
- **NEW**: Added `test:browser` script for browser mode tests (runs same
UI test suite)
  - **NEW**: Kept `test:ui` as backward-compatible alias
- **NEW**: Renamed `ui-tests` workflow job to `electron-tests` for
clarity
- [x] Update documentation with Docker usage instructions
  - Created DOCKER.md with comprehensive Docker documentation
  - Updated README.md with Docker quick start
  - **UPDATED**: CI_CD.md now lists all 10 test steps accurately
  - **NEW**: Added one-click deployment options section
  - **NEW**: Added authentication modes documentation
- [x] **NEW**: One-click deployment solutions
  - **NEW**: Created docker-compose.yml for easy deployment
- **NEW**: Added Play with Docker (PWD) badge for instant browser-based
demo
  - **NEW**: Added DigitalOcean App Platform deployment badge
  - **NEW**: Added Koyeb deployment badge
  - **NEW**: Comprehensive deployment options documentation in DOCKER.md
- **NEW**: "Try It Now" section in README.md and DOCKER.md with PWD
badge
- [x] **NEW**: Enterprise authentication integration
  - **NEW**: Added `MQTT_EXPLORER_SKIP_AUTH` environment variable
- **NEW**: Allows disabling built-in authentication for proxy-based auth
(OAuth2 Proxy, Authelia, enterprise SSO)
- **NEW**: Socket.IO emits `auth-status` event on connection with
authentication state
- **NEW**: Frontend receives auth status via Socket.IO and skips login
dialog when disabled
  - **NEW**: Logout button hidden when authentication is disabled
- **NEW**: Created AuthContext for managing authentication state across
components
- **NEW**: Comprehensive security warnings in documentation about using
skip auth only behind trusted authentication proxies
- **NEW**: Updated docker-compose.yml with commented example for proxy
authentication
- [x] Code review and security scan passed
  - Fixed health check to handle connection errors properly
  - Corrected cron schedule comment
  - No security vulnerabilities found
  - Fixed image tag naming consistency
  - Simplified dependency management
- **FIXED**: Workflow trigger paths now include all build-affecting
files
  - **FIXED**: Attestation digest reference corrected
  - **FIXED**: events directory included in Docker build context
- **FIXED**: Mosquitto service properly configured for integration
testing
- **FIXED**: MQTT broker connection now configurable for flexible
testing environments
- **IMPROVED**: Auth status now communicated via Socket.IO for better
real-time synchronization
- [x] Rename image to ghcr.io/thomasnordquist/mqtt-explorer (removed
-browser suffix)
- [x] Add multi-platform support for Raspberry Pi
  - linux/arm64 (Raspberry Pi 3/4/5)
  - linux/arm/v7 (Raspberry Pi 2/3)
- [x] Upgrade to Node.js 24 (matching project requirements)
- [x] **NEW**: Optimize Docker image for minimal size
  - Only production dependencies (no devDependencies)
  - No backend source code (only compiled JavaScript)
  - Removed build tools and dev dependencies
  - Combined layers for smaller image
  - **Image size reported in workflow summary**
- [x] **NEW**: Fix webpack build configuration
  - **Enable minification** for production builds (was disabled)
  - **Update Material-UI references** from @material-ui to @mui
  - Fix vendor chunking to include @mui and @emotion packages
  - Reduces bundle size and fixes missing component issues

### Docker Image Features:
- **Base**: Alpine Linux with Node.js 24
- **Size**: Reported automatically in workflow summary
- **Platforms**: amd64, arm64, arm/v7 (Raspberry Pi support)
- **Security**: Non-root user, minimal attack surface
- **Reliability**: Health checks, graceful shutdown
- **Persistence**: Data volume at `/app/data`
- **Registry**: ghcr.io/thomasnordquist/mqtt-explorer
- **Runtime deps**: Only production dependencies (automatically
filtered)
- **Frontend**: Minified webpack bundles with proper vendor splitting
- **Testing**: Full UI test suite with configurable MQTT broker
integration
- **One-Click Deploy**: Play with Docker, DigitalOcean, Koyeb
- **Enterprise Ready**: Optional authentication bypass for proxy-based
SSO

### Available Tags:
- `latest` - Latest stable from master
- `master`, `beta`, `release` - Latest from each branch
- `<branch>-<sha>` - Specific commits

### Authentication Options:
1. **Standard Mode** (default): Built-in username/password
authentication
- Set credentials via `MQTT_EXPLORER_USERNAME` and
`MQTT_EXPLORER_PASSWORD` environment variables
2. **Skip Authentication Mode**: Set `MQTT_EXPLORER_SKIP_AUTH=true` for
proxy-based auth
- Use only behind trusted authentication proxies (OAuth2 Proxy,
Authelia, enterprise SSO)
- Socket.IO automatically informs frontend about auth status on
connection
- Frontend skips login dialog and logout button is hidden when
authentication is disabled
- ⚠️ **Security Warning**: Only use in environments with external
authentication protection

### One-Click Deployment:
Try MQTT Explorer instantly without installation:
- **Play with Docker**: Free browser-based demo (click badge in
README.md or DOCKER.md)
- **DigitalOcean**: Deploy to managed platform starting at $5/month
- **Koyeb**: Deploy to global edge network with free tier

### Security Summary:
- CodeQL scan passed with no vulnerabilities
- Docker image runs as non-root user (UID 1001)
- Multi-stage build reduces attack surface
- Health check includes proper error handling
- Minimal runtime dependencies reduce vulnerability exposure
- Full UI test suite validates application functionality
- Build attestation with correct digest reference
- MQTT broker integration tested with configurable connection via
environment variables
- Optional authentication bypass for enterprise SSO integration (with
comprehensive security warnings)
- Auth status communicated via Socket.IO for real-time synchronization

<!-- START COPILOT ORIGINAL PROMPT -->



<details>

<summary>Original prompt</summary>

> 
> ----
> 
> *This section details on the original issue you should resolve*
> 
> <issue_title>create a docker build for the browser
solution</issue_title>
> <issue_description>Create a docker build for amd64, that ships with a
minimal image including nodes. Apply best practices and create a test
workflow that builds it , publishes it and tests the built image. Build
it every two weeks</issue_description>
> 
> ## Comments on the Issue (you are @copilot in this section)
> 
> <comments>
> </comments>
> 


</details>



<!-- START COPILOT CODING AGENT SUFFIX -->

- Fixes thomasnordquist/MQTT-Explorer#933

<!-- START COPILOT CODING AGENT TIPS -->
---

💡 You can make Copilot smarter by setting up custom instructions,
customizing its development environment and configuring Model Context
Protocol (MCP) servers. Learn more [Copilot coding agent
tips](https://gh.io/copilot-coding-agent-tips) in the docs.

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: thomasnordquist <7721625+thomasnordquist@users.noreply.github.com>
Co-authored-by: Thomas Nordquist <thomasnordquist@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
This commit is contained in:
Copilot
2025-12-22 21:06:35 +01:00
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# MQTT Explorer - Docker Browser Mode
Docker image for running MQTT Explorer in browser mode.
## Try It Now
[![Try in PWD](https://raw.githubusercontent.com/play-with-docker/stacks/master/assets/images/button.png)](https://labs.play-with-docker.com/?stack=https://raw.githubusercontent.com/thomasnordquist/MQTT-Explorer/master/docker-compose.yml)
Click the badge above to instantly try MQTT Explorer in your browser using Play with Docker (requires free Docker Hub account).
## Quick Start
### Using Pre-built Image
Pull and run the latest image from GitHub Container Registry:
```bash
docker pull ghcr.io/thomasnordquist/mqtt-explorer:latest
docker run -d \
-p 3000:3000 \
-e MQTT_EXPLORER_USERNAME=admin \
-e MQTT_EXPLORER_PASSWORD=your_secure_password \
-v mqtt-explorer-data:/app/data \
--name mqtt-explorer \
ghcr.io/thomasnordquist/mqtt-explorer:latest
```
Access the application at `http://localhost:3000`
### Using Docker Compose
Create a `docker-compose.yml` file:
```yaml
version: '3.8'
services:
mqtt-explorer:
image: ghcr.io/thomasnordquist/mqtt-explorer:latest
ports:
- "3000:3000"
environment:
- MQTT_EXPLORER_USERNAME=admin
- MQTT_EXPLORER_PASSWORD=your_secure_password
- PORT=3000
volumes:
- mqtt-explorer-data:/app/data
restart: unless-stopped
volumes:
mqtt-explorer-data:
```
Then run:
```bash
docker-compose up -d
```
## Environment Variables
| Variable | Required | Default | Description |
|----------|----------|---------|-------------|
| `MQTT_EXPLORER_USERNAME` | No | Generated | Username for authentication |
| `MQTT_EXPLORER_PASSWORD` | No | Generated | Password for authentication |
| `MQTT_EXPLORER_SKIP_AUTH` | No | `false` | Set to `true` to disable authentication (use only behind a secure proxy!) |
| `PORT` | No | `3000` | Port the server listens on |
| `ALLOWED_ORIGINS` | No | `*` | Comma-separated list of allowed CORS origins |
| `NODE_ENV` | No | - | Set to `production` for production deployments |
### Authentication Modes
**Standard Mode (Default):**
- Requires username and password for access
- Credentials can be set via environment variables or auto-generated
- Auto-generated credentials are logged on first startup and saved to `/app/data/credentials.json`
**Skip Authentication Mode (Use with caution!):**
```bash
docker run -d -p 3000:3000 \
-e MQTT_EXPLORER_SKIP_AUTH=true \
ghcr.io/thomasnordquist/mqtt-explorer:latest
```
⚠️ **WARNING**: When `MQTT_EXPLORER_SKIP_AUTH=true`, the application is **completely open** without any authentication. This should **only be used** when MQTT Explorer is deployed behind a secure authentication proxy (e.g., OAuth2 Proxy, Authelia, Nginx with auth_request) or in a trusted private network.
**Recommended use case**: Integration with enterprise SSO systems where authentication is handled by a reverse proxy.
**Note**: If credentials are not provided and auth is not skipped, they will be auto-generated and stored in `/app/data/credentials.json`. Check the container logs to see the generated credentials:
```bash
docker logs mqtt-explorer
```
## Data Persistence
The container stores data in `/app/data`, including:
- User credentials (`credentials.json`)
- Connection settings (`settings.json`)
- Uploaded certificates (`certificates/`)
- File uploads (`uploads/`)
Mount a volume to persist data across container restarts:
```bash
docker run -v mqtt-explorer-data:/app/data ...
```
## Building from Source
Build the Docker image locally:
```bash
docker build -f Dockerfile.browser -t mqtt-explorer:local .
```
Run the locally built image:
```bash
docker run -d \
-p 3000:3000 \
-e MQTT_EXPLORER_USERNAME=admin \
-e MQTT_EXPLORER_PASSWORD=secret \
mqtt-explorer:local
```
## Health Check
The container includes a health check that runs every 30 seconds. Check the health status:
```bash
docker inspect --format='{{.State.Health.Status}}' mqtt-explorer
```
## Security Best Practices
1. **Use HTTPS in Production**: Put the container behind a reverse proxy (nginx, Traefik) with HTTPS
2. **Set Strong Credentials**: Always set custom credentials via environment variables
3. **Network Isolation**: Run in a private network when possible
4. **Update Regularly**: Pull the latest image regularly for security updates
### Example with Nginx Reverse Proxy
```nginx
server {
listen 443 ssl http2;
server_name mqtt-explorer.example.com;
ssl_certificate /path/to/cert.pem;
ssl_certificate_key /path/to/key.pem;
location / {
proxy_pass http://localhost:3000;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
}
}
```
## Troubleshooting
### Container won't start
Check the logs:
```bash
docker logs mqtt-explorer
```
### Can't access the application
1. Verify the container is running: `docker ps`
2. Check the port mapping: `docker port mqtt-explorer`
3. Test connectivity: `curl http://localhost:3000`
### Authentication issues
1. Check generated credentials in logs: `docker logs mqtt-explorer`
2. Verify environment variables: `docker inspect mqtt-explorer`
3. Reset credentials by removing the data volume and restarting
### Permission issues
The container runs as a non-root user (UID 1001). If mounting host directories, ensure they're writable:
```bash
chown -R 1001:1001 /path/to/host/data
docker run -v /path/to/host/data:/app/data ...
```
## Available Tags
- `latest` - Latest stable version from the master branch
- `master` - Latest build from master branch
- `beta` - Latest beta version
- `release` - Latest release version
- `master-<sha>` - Specific commit from master
- `beta-<sha>` - Specific commit from beta
- `release-<sha>` - Specific commit from release
## Supported Platforms
The Docker image is built for multiple architectures:
- `linux/amd64` - x86-64 (standard PCs, servers)
- `linux/arm64` - ARM 64-bit (Raspberry Pi 3/4/5, Apple Silicon)
- `linux/arm/v7` - ARM 32-bit (Raspberry Pi 2/3)
## One-Click Deployment Options
### Play with Docker (Free)
Try MQTT Explorer instantly in your browser without installing anything:
[![Try in PWD](https://raw.githubusercontent.com/play-with-docker/stacks/master/assets/images/button.png)](https://labs.play-with-docker.com/?stack=https://raw.githubusercontent.com/thomasnordquist/MQTT-Explorer/master/docker-compose.yml)
- **No installation required** - Runs entirely in your browser
- **Free to use** - Requires only a Docker Hub account
- **Perfect for demos** - Great for testing and demonstrations
- **4-hour sessions** - Sessions automatically expire after 4 hours
### Cloud Platforms
Deploy MQTT Explorer to various cloud platforms with one click:
#### DigitalOcean App Platform
[![Deploy to DO](https://www.deploytodo.com/do-btn-blue.svg)](https://cloud.digitalocean.com/apps/new?repo=https://github.com/thomasnordquist/MQTT-Explorer/tree/master&refcode=docker)
- Automatically detects Docker configuration
- Managed platform with auto-scaling
- Starting at $5/month
#### Koyeb
[![Deploy to Koyeb](https://www.koyeb.com/static/images/deploy/button.svg)](https://app.koyeb.com/deploy?type=docker&name=mqtt-explorer&image=ghcr.io/thomasnordquist/mqtt-explorer:latest&ports=3000;http;/)
- Deploy directly from Docker image
- Global edge network
- Free tier available
**Note:** Remember to set the environment variables `MQTT_EXPLORER_USERNAME` and `MQTT_EXPLORER_PASSWORD` when deploying to cloud platforms.
## License
See the main [LICENSE.md](LICENSE.md) file.