docker redis checks

docker-compose.yml

@@ -1,4 +1,20 @@
 services:
+  redis:
+    image: redis:7-alpine
+    container_name: classroomcopilot-redis
+    ports:
+      - "6379:6379"
+    volumes:
+      - redis-data:/data
+    command: redis-server --appendonly yes
+    networks:
+      - kevlarai-network
+    healthcheck:
+      test: ["CMD", "redis-cli", "ping"]
+      interval: 5s
+      timeout: 3s
+      retries: 5
+
   backend:
     container_name: api
     build:
@@ -6,11 +22,19 @@ services:
       dockerfile: Dockerfile
     env_file:
       - .env
+    environment:
+      - REDIS_HOST=redis
     ports:
       - 8000:8000
+    depends_on:
+      redis:
+        condition: service_healthy
     networks:
       - kevlarai-network
 
+volumes:
+  redis-data:
+
 networks:
   kevlarai-network:
     name: kevlarai-network