Build an Angular app once, Deploy Anywhere with Docker & Nginx

Standard Angular builds bake environment variables into the code at build time. This means if you have Dev , Staging , and Prod environments, you have to build the app three times. That's a waste of time. Instead, we should build a single Docker image and swap configurations at runtime. Here is how to do it. 1. The Strategy We will store environment-specific configurations in JSON files and use an Entrypoint script in Docker to swap them based on an environment variable. Step 1: Create Config Fi