A bad Dockerfile leads to bloated images and slow deployments. A great Dockerfile makes your pipeline fly.
1The Layer Cache
Docker remembers the result of each instruction. By ordering your instructions from 'least likely to change' to 'most likely to change', you can reduce build times from minutes to seconds.
2Security Best Practices
Never run your app as 'root'. Use the 'USER' instruction to switch to a low-privilege user like 'node' before starting your application.
3Multi-Stage Power
In stage one, compile your TypeScript or build your assets. In stage two, copy ONLY the final dist folder. Your users don't need the source code to run the app!
