chore(docker): update ports and switch frontend to serve static files

- Change frontend port from 80 to 8847 and backend port from 3001 to 9173 in .env.example
- Replace nginx stage in frontend Dockerfile with node alpine and serve for static hosting
- Remove nginx.conf and related configuration for frontend static serving
- Update docker-compose ports and healthcheck URLs to match new port assignments
- Adjust server Dockerfile to expose new backend port 9173 and update healthcheck URL
- Create non-root user in frontend Dockerfile and run serve command on port 8847
- Update healthcheck commands to use wget on new ports for both frontend and backend

docker-compose.yml

@@ -10,13 +10,13 @@ services:
         - VITE_GOOGLE_CLIENT_ID=${VITE_GOOGLE_CLIENT_ID}
         - VITE_API_URL=${VITE_API_URL:-}
     ports:
-      - "${FRONTEND_PORT:-80}:80"
+      - "${FRONTEND_PORT:-8847}:8847"
     depends_on:
       backend:
         condition: service_healthy
     restart: unless-stopped
     healthcheck:
-      test: [ "CMD", "wget", "-q", "--spider", "http://localhost:80" ]
+      test: [ "CMD", "wget", "-q", "--spider", "http://localhost:8847" ]
       interval: 30s
       timeout: 10s
       retries: 3
@@ -29,9 +29,9 @@ services:
       context: ./server
       dockerfile: Dockerfile
     ports:
-      - "${BACKEND_PORT:-3001}:3001"
+      - "${BACKEND_PORT:-9173}:9173"
     environment:
-      - PORT=3001
+      - PORT=9173
       - NODE_ENV=${NODE_ENV:-production}
       - VITE_MS_CLIENT_ID=${VITE_MS_CLIENT_ID}
       - MS_CLIENT_SECRET=${MS_CLIENT_SECRET}
@@ -40,7 +40,7 @@ services:
       - REDIRECT_URI=${REDIRECT_URI}
     restart: unless-stopped
     healthcheck:
-      test: [ "CMD", "wget", "-q", "--spider", "http://localhost:3001/health" ]
+      test: [ "CMD", "wget", "-q", "--spider", "http://localhost:9173/health" ]
       interval: 30s
       timeout: 10s
       retries: 3