Support for docker secrets

[frankforpresident]

@xirixiz,

After conducting thorough research, I've discovered a method to enable Docker secrets by implementing an entry script. This script populates the necessary environment variables before initiating the application. This pull request is inspired by this repository, and I've made modifications to enhance its functionality, specifically by adding generic support for the _FILE postfix.

I've also included a comprehensive example to demonstrate how the script should be utilized.

[xirixiz]

Perfect! Thanks @frankforpresident! Appreciated very much. Currently a big change is being implemented (development branch). Once the changes have been confirmed working properly for hassio, I will merge the dev branch to the main branch and also merge your PR. Approx somewhere upcoming week.

[thijskuijpers]

I am trying to use the secrets but the version with postfix _FILE does not work for me. Also using the DOCKER-SECRET->dsmrreader_admin_password does not work, it uses this exact string as password. Finally tried the FILE__ prefix as mentioned in the manual but that does not work either and I cannot find this prefix in the code. So I expect the first two options should work, but maybe I miss something in my docker compose script. Any help is appreciated, thanks!

dsmr: image: ghcr.io/xirixiz/dsmr-reader-docker:latest depends_on: dsmrdb: condition: service_healthy container_name: dsmr links:

• dsmrdb cap_add:
• NET_ADMIN restart: unless-stopped secrets:
• dsmrreader_admin_password volumes:
• /etc/localtime:/etc/localtime:ro
• ./dsmr_backups:/app/backups environment:
• TZ=Europe/Amsterdam
• DJANGO_TIME_ZONE=Europe/Amsterdam
• VIRTUAL_HOST=localhost
• DSMRREADER_ADMIN_PASSWORD=DOCKER-SECRET->dsmrreader_admin_password ports:
• 7777:80
• 7779:443

secrets: dsmrreader_admin_password: file: /share/Docker_DSMR/Secrets/dsmr_pass.txt