restructure backend folder and database

apps/backend/database/docker-compose.yml

@@ -0,0 +1,36 @@
+### Database (./apps/database/docker-compose.yml)
+# - [ ] Create a MariaDB service
+# - [ ] Configure volumes for persistent storage of database data
+secrets:
+  mariadb_root:
+    file: ${ROOT_DIR:-../../..}/env/secrets.env
+services:
+    database:
+        secrets:
+          - mariadb_root
+        profiles: ["all", "database", "backend", "app"]
+        image: mariadb:latest
+        container_name: ${INFRASTRUCTURE_LABEL:-default}-mariadb-${ENVIRONMENT:-development}
+        command: --bind-address=0.0.0.0
+        env_file: 
+            - ${ROOT_DIR:-../../..}/env/${ENVIRONMENT:-development}/.env.database
+        volumes:
+            - backend_mariadb_data:/var/lib/mysql
+            - ./healthcheck.sh:/usr/local/bin/healthcheck.sh 
+        networks:
+            - backend
+            - database
+        healthcheck:
+          test: ["CMD", "bash", "/usr/local/bin/healthcheck.sh"]
+          interval: 1s
+          retries: 3
+        # TODO: ADMINER IS NOT PREPARED FOR TRAEFIK 
+networks:
+    backend:
+        name: ${INFRASTRUCTURE_LABEL:-default}-backend-${ENVIRONMENT:-development}
+    database:
+        name: ${INFRASTRUCTURE_LABEL:-default}-database-${ENVIRONMENT:-development}
+volumes:
+    backend_mariadb_data:
+        driver: local
+        name: ${INFRASTRUCTURE_LABEL:-default}_mariadb_${ENVIRONMENT:-development}