refactor: Integrate Flyway for database migrations and simplify Docker Compose and tenant configurations.

compose.yaml

@@ -10,9 +10,7 @@ services:
       POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
     networks:
       - proxy
-    depends_on:
-      db:
-        condition: service_healthy
+
   frontend:
     container_name: frontend
     restart: always
@@ -23,6 +21,7 @@ services:
       - proxy
     depends_on:
       - backend
+
   db:
     image: postgres:alpine3.23
     container_name: db
@@ -30,21 +29,12 @@ services:
     ports:
       - "5432:5432"
     environment:
-      POSTGRES_USER: ${POSTGRES_USER}
-      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+      POSTGRES_USER: myuser
+      POSTGRES_PASSWORD: supersecretpassword
       POSTGRES_DB: app_db
-    volumes:
-      - ./db/data:/var/lib/postgresql
-      - ./db/init:/docker-entrypoint-initdb.d:ro
     networks:
       - proxy
-    healthcheck:
-      test:
-        - CMD-SHELL
-        - pg_isready -U ${POSTGRES_USER} -d app_db
-      interval: 10s
-      timeout: 5s
-      retries: 5
+
 networks:
   proxy:
     external: true