docker-compose - how to escape environment variables

docker environment-variables docker-compose

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}"

CodeHunter