My first basic loadBalancer

docker-compose.yml

@@ -0,0 +1,43 @@
+version: '3.9'
+services:
+  app-1:
+    image: node-app:v1
+    ports:
+      - "3001:3000"
+    networks:
+      -  app-network
+    environment:
+      - INSTANCE_NAME=app-1
+
+  app-2:
+    image: node-app:v1
+    ports:
+      - "3002:3000"
+    networks:
+      -  app-network
+    environment:
+      - INSTANCE_NAME=app-2
+
+  app-3:
+    image: node-app:v1
+    ports:
+      - "3003:3000"
+    networks:
+      -  app-network
+    environment:
+      - INSTANCE_NAME=app-3
+
+
+  nginx:
+    image: nginx:alpine
+    ports:
+      - "80:80"
+    volumes:
+      - ./files/nginx.conf:/etc/nginx/nginx.conf:ro
+    networks:
+      - app-network
+      
+
+networks:
+  app-network:
+    driver: bridge