Have a single build with possibility of switching between environment variables without actually rebuilding the entire app

Usage

Environment variables are inside the .env-cmdrc.json file. Currently there are 3 environments (dev, staging, demo).

1. Define a .env.example file, with variables you want set on our environment
2. Add the variables from .env.example to .env-cmdrc.json under each environment
3. Build the application npm run build
4. Preview the build on different environments with npm run start:staging, npm run start:demo, etc.

Under the hood

1. Using @import-meta-env/unplugin that on build time (npm run build) will substitute all import.meta.env from our source code to a predefined placeholder
2. Then running env-cmd -e demo (where demo is a environment from .env-cmdrc.json ) will set up the environment variables for us
3. Then running import-meta-env --example .env.example -o "build/**/*" will substitute the predefined placeholder from build with the actual environment variables