Files
stackrender/DOCKER.md
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Alberto Arena fe84e0d748 build: raise Node heap for production build
The production build renders thousands of modules and exceeds V8's
default heap ceiling, so `npm run build` fails with a JavaScript
heap out-of-memory error during "rendering chunks". Set
NODE_OPTIONS=--max-old-space-size=8192 on the Vite build step via
cross-env (kept portable for Windows), so a fresh clone builds
without any manual environment setup. Document the matching Docker
memory requirement in DOCKER.md, since the container build hits the
same limit when the Docker VM has too little RAM.
2026-08-04 18:06:11 +02:00

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3.9 KiB
Markdown

# Docker Deployment Guide
This guide explains how to run StackRender using Docker.
## Quick Start
### Using Docker Compose (Recommended)
The easiest way to run StackRender:
```bash
docker compose up -d
```
The application will be available at `http://localhost:8080`
To stop the application:
```bash
docker compose down
```
### Using Docker CLI
Build the image:
```bash
docker build -t stackrender .
```
Run the container:
```bash
docker run -d -p 8080:80 --name stackrender stackrender
```
Stop and remove the container:
```bash
docker stop stackrender
docker rm stackrender
```
## Configuration
### Port Mapping
By default, the application runs on port 80 inside the container and is mapped to port 8080 on the host. You can change this in `docker-compose.yml`:
```yaml
ports:
- "YOUR_PORT:80"
```
Or when using Docker CLI:
```bash
docker run -d -p YOUR_PORT:80 --name stackrender stackrender
```
### Health Check
The Docker Compose configuration includes a health check that verifies the application is responding correctly:
```yaml
healthcheck:
test: ["CMD", "wget", "--quiet", "--tries=1", "--spider", "http://localhost:80/"]
interval: 30s
timeout: 10s
retries: 3
start_period: 40s
```
## Architecture
### Multi-Stage Build
The Dockerfile uses a multi-stage build approach:
1. **Builder Stage**: Uses Node.js 20 to install dependencies and build the application
2. **Production Stage**: Uses Nginx Alpine to serve the static files
This approach minimizes the final image size by excluding build tools and dependencies.
### Nginx Configuration
The application uses a custom Nginx configuration (`nginx.conf`) that:
- Enables gzip compression for better performance
- Sets security headers (X-Frame-Options, X-Content-Type-Options, X-XSS-Protection)
- Handles client-side routing (React Router)
- Configures caching for static assets
## Troubleshooting
### Build Issues
If you encounter SSL certificate issues during the build, the Dockerfile includes a workaround:
```dockerfile
RUN npm config set strict-ssl false && npm install
```
This is necessary in some build environments with certificate validation issues.
### Out of Memory During Build
The production build is memory-intensive (the app compiles thousands of modules). If `docker compose up` or `docker build` fails with an out-of-memory error such as `Reached heap limit` or `cannot allocate memory` during the `npm run build` step, increase the memory available to Docker:
- **Docker Desktop**: Settings, then Resources, then Memory. Set it to at least **6-8 GB** and apply.
The Dockerfile raises the Node heap (`NODE_OPTIONS=--max-old-space-size`) for the build. That heap size must fit inside the memory available to Docker, so raising the Docker memory limit is the fix when the build runs out of memory.
### Container Not Starting
Check the logs:
```bash
docker logs stackrender
```
Or with Docker Compose:
```bash
docker compose logs
```
### Port Already in Use
If port 8080 is already in use, you can change it in `docker-compose.yml` or use a different port with Docker CLI:
```bash
docker run -d -p 8081:80 --name stackrender stackrender
```
## Development
For development, it's recommended to run the application directly with Node.js instead of Docker:
```bash
npm install
npm run dev
```
Docker is primarily intended for production deployments or testing the production build locally.
## Production Deployment
For production deployments:
1. Build the image:
```bash
docker build -t stackrender:production .
```
2. Push to your container registry:
```bash
docker tag stackrender:production your-registry/stackrender:latest
docker push your-registry/stackrender:latest
```
3. Deploy using your orchestration tool (Kubernetes, Docker Swarm, etc.)
## Additional Resources
- [Docker Documentation](https://docs.docker.com/)
- [Docker Compose Documentation](https://docs.docker.com/compose/)
- [Nginx Documentation](https://nginx.org/en/docs/)