MDBF-426: Feedback-plugin-backend: Docker compose example using the plugin doesn't work

- Update env file, no strings
- Implement healtcheck by using `healthcheck` script from MariaDB, needed `mysql` user created by new env var
- Implement condition for `depends_on` service using `condition` tag that is only available for 2.1 version (not yet for 3.0)

Author: an3l

docker/.env

@@ -8,6 +8,7 @@ PYTHON_VERSION=3.9
 NGINX_VERSION=latest
 MARIADB_VERSION=10.6
 MARIADB_ROOT_PASSWORD=1234
+MARIADB_MYSQL_LOCALHOST_USER=1
 
 # For development purposes, the database data directory and configuration file
 # are passed from the repository. In production these should be set to where you
@@ -19,7 +20,7 @@ MARIADB_CONFDIR=./mariadb/confdir
 # for your deployed server.
 DJANGO_ALLOWED_HOSTS=*
 # This key needs to be set to something proper one in a production deployment.
-DJANGO_SECRET_KEY='123'
+DJANGO_SECRET_KEY=123
 # Any non empty string enables Debug mode for Django
 DJANGO_DEBUG=True
 
@@ -28,9 +29,9 @@ DJANGO_DEBUG=True
 # as well as the user name exists.
 #
 # There will also be a test_{DJANGO_DB_NAME} database used for running tests.
-DJANGO_DB_NAME='feedback_plugin'
-DJANGO_DB_USER_NAME='feedback'
-DJANGO_DB_USER_PASSWORD='A;p4rqgDt-Mf7L{z'
+DJANGO_DB_NAME=feedback_plugin
+DJANGO_DB_USER_NAME=feedback
+DJANGO_DB_USER_PASSWORD=A;p4rqgDt-Mf7L{z
 
 # Control logging level for Django.
-DJANGO_LOG_LEVEL='ERROR'
+DJANGO_LOG_LEVEL=ERROR

docker/docker-compose.yml

@@ -1,4 +1,4 @@
-version: '3'
+version: '2.1'
 services:
   db:
     build:
@@ -13,6 +13,12 @@ services:
       - DJANGO_DB_NAME
       - DJANGO_DB_USER_NAME
       - DJANGO_DB_USER_PASSWORD
+      - MARIADB_MYSQL_LOCALHOST_USER
+    healthcheck:
+      test: /usr/local/bin/healthcheck.sh --su=mysql --innodb_initialized
+      interval: 3s
+      timeout: 2s
+      retries: 3
     volumes:
       - ${MARIADB_DATADIR}:/var/lib/mysql
       - ${MARIADB_CONFDIR}:/etc/mysql/mariadb.conf.d
@@ -40,8 +46,8 @@ services:
       - static_volume:/app/src/staticfiles
       - ../src/:/app/src/
     depends_on:
-      - db
-
+      db:
+        condition: service_healthy
   nginx:
     build:
       context: ./nginx