refactor: use custom network name slc_network

- Define custom network 'slc_network' instead of default
- Add network configuration to all services
- Replace spotlightcam_default with slc_network

docker-compose.yml

@@ -21,6 +21,8 @@ services:
     profiles: ["dev"]
     ports:
       - "8080:80"
+    networks:
+      - slc_network
 
   nginx-prod:
     image: nginx:alpine
@@ -42,6 +44,8 @@ services:
         max-size: "10m"
         max-file: "3"
     profiles: ["prod"]
+    networks:
+      - slc_network
 
   # ============================================
   # Frontend - React/Vite Application
@@ -65,6 +69,8 @@ services:
     command: npm run dev
     restart: unless-stopped
     profiles: ["dev"]
+    networks:
+      - slc_network
 
   frontend-prod:
     build:
@@ -85,6 +91,8 @@ services:
         max-size: "10m"
         max-file: "3"
     profiles: ["prod"]
+    networks:
+      - slc_network
 
   # ============================================
   # Backend - Node.js/Express API
@@ -116,6 +124,8 @@ services:
     command: npm run dev
     restart: unless-stopped
     profiles: ["dev"]
+    networks:
+      - slc_network
 
   backend-prod:
     build:
@@ -156,6 +166,8 @@ services:
           cpus: '0.5'
           memory: 256M
     profiles: ["prod"]
+    networks:
+      - slc_network
 
   # ============================================
   # Database - PostgreSQL
@@ -173,6 +185,8 @@ services:
       - "5432:5432"  # Exposed for dev tools
     restart: unless-stopped
     profiles: ["dev"]
+    networks:
+      - slc_network
 
   db-prod:
     image: postgres:15-alpine
@@ -200,9 +214,16 @@ services:
           cpus: '1'
           memory: 1G
     profiles: ["prod"]
+    networks:
+      - slc_network
 
 volumes:
   postgres_data:
     driver: local
   postgres_data_prod:
     driver: local
+
+networks:
+  slc_network:
+    driver: bridge
+    name: slc_network