How to access entrypoint.sh values in my docker-compose file? - docker-compose

Question

How do I access entrypoint.sh values in docker-compose file. I have declared all the values in entrypoint.sh as shown below. I need to access those in my docker-compose file
I have used docker-volumes to copy the entrypoint.sh script to /usr/local/bin directory in the docker container.
entrypoint.sh script
MONGO_ROOT_USERNAME=root
MONGO_ROOT_PASSWORD=mongo#123
MONGO_EXPRESS_USERNAME=root
MONGO_EXPRESS_PASSWORD=express#123
docker-compose file
mongo-express:
image: mongo-express
ports:
- 8081:8081
volumes:
- "./docker-scripts/entrypoint.sh:/usr/local/bin"
environment:
ME_CONFIG_BASICAUTH_USERNAME: ${MONGO_EXPRESS_USERNAME}
ME_CONFIG_BASICAUTH_PASSWORD: ${MONGO_EXPRESS_PASSWORD}
ME_CONFIG_MONGODB_PORT: 27017
ME_CONFIG_MONGODB_ADMINUSERNAME: ${MONGO_ROOT_USERNAME}
ME_CONFIG_MONGODB_ADMINPASSWORD: ${MONGO_ROOT_PASSWORD}
But when I run docker-compose -d I get this message
WARNING: The MONGO_ROOT_USERNAME variable is not set. Defaulting to a blank string.
WARNING: The MONGO_ROOT_PASSWORD variable is not set. Defaulting to a blank string.
WARNING: The MONGO_EXPRESS_USERNAME variable is not set. Defaulting to a blank string.
WARNING: The MONGO_EXPRESS_PASSWORD variable is not set. Defaulting to a blank string.

Answer 1

you forget to export your env variables:
export MONGO_ROOT_USERNAME=root
export MONGO_ROOT_PASSWORD=mongo#123
export MONGO_EXPRESS_USERNAME=root
export MONGO_EXPRESS_PASSWORD=express#123
Update1:
So firsty create a .env file, then add it to your docker compose
.env
MONGO_ROOT_USERNAME=root
MONGO_ROOT_PASSWORD=mongo#123
MONGO_EXPRESS_USERNAME=root
MONGO_EXPRESS_PASSWORD=express#123
Then on docker-compose.yml
mongo-express:
image: mongo-express
ports:
- 8081:8081
volumes:
- "./docker-scripts/entrypoint.sh:/usr/local/bin"
env_file: # <-- Add this line
- .env # <-- Add this line
environment:
ME_CONFIG_BASICAUTH_USERNAME: ${MONGO_EXPRESS_USERNAME}
ME_CONFIG_BASICAUTH_PASSWORD: ${MONGO_EXPRESS_PASSWORD}
ME_CONFIG_MONGODB_PORT: 27017
ME_CONFIG_MONGODB_ADMINUSERNAME: ${MONGO_ROOT_USERNAME}
ME_CONFIG_MONGODB_ADMINPASSWORD: ${MONGO_ROOT_PASSWORD}