docker-compose - how to escape environment variables

Question

With docker-compose v2 environment variables can be set by simply:

enviroment:
  - MONGO_PATH=mongodb://db-mongo:27017

The ful

Answer 1

Environment variables (including their name), have to be fully wrapped inside single or double quotes: "" or ''

environment:
  - 'NODE_CONFIG={"database": {"data": {"host": "mongo"}, "session": {"host": "redis" }}}'

And using double quotes:

environment:
  - 'PORT=3000'
  - "NODE_CONFIG={\"database\": {\"data\": {\"host\": \"mongo\"}, \"session\": {\"host\": \"redis\" }}}"

It is remarkable to note that using double quotes "", like bash, will allow placing variables inside the environment variable.

"MY_HOME_ENV_VARIABLE=${HOME}"