Feedback plugin docker folder has currently of 3 applications

• web application, Django, in folder docker/app
• database application MariaDB, in folder docker/mariadb
• nginx application in folder docker/nginx

Each application has it's related Dockerfile as well as configuration settings, that
may and need to be optimized.

Dockerfiles changes that needs to be done for mariadb:

• do not use pip installation and related .py script,
• delete .py script
• create new bash script to initialize database and generate smaller image

Dockerfiles changes that needs to be done for app:

• do not install mariadb to increase generated image size. Instead create networks in docker-compose file that will ensure proper inter container communication and set proper settings in app.settings.py.
• do not install gunicorn as dependency, but rather define it as an requirements to be installed with pip.
• do not create logs folder, but rather mount that folder during docker-compose

Dockerfiles changes that needs to be done for nginx:

• remove Dockerfile and use vanilla nginx and mount needed configuration in docker-compose

This task should also optimize and cleanup things in docker compose like

• environment variables, use proper one for db service to create the user
• add networks tag in docker-compose for proper inter container communication
• mount volume for gunicorn logs directory
• use mariadb configuration file container path
• bump the docker compose version
• add healty check for mariadb container
• use long syntax for conditions on web service to wait on mariadb service to be healthy
• remove db dependency for nginx