fix: update Docker Compose configuration for service names and database connection

docker-compose.yml

@@ -4,14 +4,13 @@ services:
   postgres:
     image: postgres:16-alpine
     restart: unless-stopped
+    container_name: condado-newsletter-postgres
     environment:
       POSTGRES_DB: condado
       POSTGRES_USER: ${SPRING_DATASOURCE_USERNAME}
       POSTGRES_PASSWORD: ${SPRING_DATASOURCE_PASSWORD}
     volumes:
       - postgres-data:/var/lib/postgresql/data
-    networks:
-      - condado-net
     healthcheck:
       test: ["CMD-SHELL", "pg_isready -U ${SPRING_DATASOURCE_USERNAME} -d condado"]
       interval: 10s
@@ -20,6 +19,7 @@ services:
 
   # ── Backend (Spring Boot) ────────────────────────────────────────────────────
   backend:
+    container_name: condado-newsletter-backend
     build:
       context: ./backend
       dockerfile: Dockerfile
@@ -29,7 +29,7 @@ services:
         condition: service_healthy
     environment:
       SPRING_PROFILES_ACTIVE: dev
-      SPRING_DATASOURCE_URL: ${SPRING_DATASOURCE_URL}
+      SPRING_DATASOURCE_URL: jdbc:postgresql://postgres:5432/condado
       SPRING_DATASOURCE_USERNAME: ${SPRING_DATASOURCE_USERNAME}
       SPRING_DATASOURCE_PASSWORD: ${SPRING_DATASOURCE_PASSWORD}
       APP_PASSWORD: ${APP_PASSWORD}
@@ -50,36 +50,42 @@ services:
     extra_hosts:
       - "celtinha.desktop:host-gateway"
       - "host.docker.internal:host-gateway"
-    networks:
-      - condado-net
 
   # ── Frontend + Nginx ─────────────────────────────────────────────────────────
   nginx:
+    container_name: condado-newsletter-frontend
     build:
       context: ./frontend
       dockerfile: Dockerfile
       args:
         VITE_API_BASE_URL: ${VITE_API_BASE_URL}
     restart: unless-stopped
-    ports:
-      - "80:80"
     depends_on:
       - backend
     networks:
-      - condado-net
+      - traefik
+    labels:
+      - "traefik.enable=true"
+      - "traefik.http.routers.condado.rule=Host(`condado-newsletter.lab`)"
+      - "traefik.http.services.condado.loadbalancer.server.port=80"
+      - "homepage.group=Hyperlink"
+      - "homepage.name=Condado Newsletter"
+      - "homepage.description=Automated newsletter generator using AI"  
+      - "homepage.logo=claude-dark.png"
+      - "homepage.href=http://condado-newsletter.lab"
 
   # ── Mailhog (DEV ONLY — SMTP trap) ───────────────────────────────────────────
   mailhog:
+    container_name: condado-newsletter-mailhog
     image: mailhog/mailhog:latest
     restart: unless-stopped
     ports:
       - "8025:8025"
-    networks:
-      - condado-net
 
 volumes:
   postgres-data:
 
 networks:
-  condado-net:
-    driver: bridge
+  traefik:
+    external: true
+    name: traefik