fix(docker): Add missing dependencies for backend and add healthcheck for docker

docker-compose.yaml

@@ -8,17 +8,25 @@ services:
     ports:
       - "3306:3306"
     volumes:
-      - ./db/init.sql:/docker-entrypoint-initdb.d/init.sql
+      - ./db/init.sql:/docker-entrypoint-initdb.d/init.sql:Z
+    healthcheck:
+      test: ["CMD", "mysqladmin", "ping", "-h", "localhost"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
 
   backend:
     build: ./backend
+    restart: always
     ports:
       - "5000:5000"
     depends_on:
-      - db
+      db:
+        condition: service_healthy
 
   frontend:
     build: ./frontend
+    restart: always
     ports:
       - "3000:3000"
     depends_on: