Heavy production containers slow down deployments and increase server costs. Multi-stage Docker builds allow you to isolate build environments and output lightweight containers. Here is how.
1. Isolating Build Tools
In the initial build stage, we use a Node image to compile typescript files and package modules. In the production stage, we copy only the compiled javascript files and necessary dependencies into a lightweight Alpine Linux baseline.
2. Eliminating Development Dependencies
By running pnpm install --prod in the production stage, we omit all development packages (like typescript compiler wrappers or test utilities), reducing the final image size to under 50MB.
Conclusion
Using multi-stage builds optimizes deployment pipelines. It reduces server memory overhead and speeds up container startup times across your cloud clusters.