add redis and executor services into docker-compose files

.env.example

@@ -12,3 +12,9 @@ DATABASE_URL=postgres://codesce:changeme@database:5432/codesce?sslmode=disable
 # Frontend
 FRONTEND_PORT=3000
 VITE_API_URL=http://localhost:6767
+
+# Redis
+REDIS_URL=redis://redis:6379
+WORKER_COUNT=4
+EXECUTION_TIMEOUT=10
+SANDBOX_MEMORY_LIMIT=256

Dockerfile

@@ -24,3 +24,12 @@ COPY --from=build /bin/server /bin/server
 EXPOSE 6767
 
 CMD ["/bin/server"]
+
+
+FROM python3.12-slim 
+
+WORKDIR /app
+
+# entrypoint lets us pipe stdin and returns stdout
+
+ENTRYPOINT ["python", "/code/solution.py"]

docker-compose.dev.yml

@@ -2,7 +2,27 @@ services:
   database:
     ports:
       - "${DB_PORT:-5432}:5432"
-
+  redis:
+    ports:
+      - "6379:6379"
+  executor:
+    # docker can only access files in /executor
+    build:
+      context: ./executor
+      dockerfile: Dockerfile.dev
+    environment:
+      REDIS_URL: ${REDIS_URL}
+      DATABASE_URL: postgres://${POSTGRES_USER}:${POSTGRES_PASSWORD}@database:5432/${POSTGRES_DB}?sslmode=disable
+      WORKER_COUNT: ${WORKER_COUNT}
+      EXECUTION_TIMEOUT: ${EXECUTION_TIMEOUT}
+      SANDBOX_MEMORY_LIMIT: ${SANDBOX_MEMORY_LIMIT}
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock
+    depends_on:
+      redis:
+        condition: service_healthy
+      database:
+        condition: service_healthy
   backend:
     build:
       context: .
@@ -11,6 +31,7 @@ services:
       GIN_MODE: debug
       PORT: ${BACKEND_PORT:-6767}
       DATABASE_URL: postgres://${POSTGRES_USER}:${POSTGRES_PASSWORD}@database:5432/${POSTGRES_DB}?sslmode=disable
+      REDIS_URL: ${REDIS_URL}
     volumes:
       - .:/app
       - go-mod-cache:/go/pkg/mod

docker-compose.yml

@@ -1,4 +1,34 @@
 services:
+# each service is a container
+  redis:
+    image: redis:7-alpine
+    ports:
+      - "6379:6379"
+    # will return pong if up
+    healthcheck: 
+      test: ["CMD-SHELL", "redis-cli", "ping"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+  executor:
+    build:
+      context: ./executor
+      dockerfile: Dockerfile
+    environment:
+      REDIS_URL: ${REDIS_URL}
+      DATABASE_URL: postgres://${POSTGRES_USER}:${POSTGRES_PASSWORD}@database:5432/${POSTGRES_DB}?sslmode=disable
+      WORKER_COUNT: ${WORKER_COUNT}
+      EXECUTION_TIMEOUT: ${EXECUTION_TIMEOUT}
+      SANDBOX_MEMORY_LIMIT: ${SANDBOX_MEMORY_LIMIT}
+    # executor allows us to run other containers
+    # left side is file from host, right side is file inside container
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock
+    depends_on:
+      redis:
+        condition: service_healthy
+      database:
+        condition: service_healthy
   database:
     image: postgres:16-alpine
     container_name: codesce-db
@@ -25,6 +55,7 @@ services:
       DATABASE_URL: postgres://${POSTGRES_USER}:${POSTGRES_PASSWORD}@database:5432/${POSTGRES_DB}?sslmode=disable
       GIN_MODE: ${GIN_MODE:-release}
       PORT: ${BACKEND_PORT:-6767}
+      REDIS_URL: ${REDIS_URL}
     ports:
       - "${BACKEND_PORT:-6767}:6767"
     depends_on: