feat(17-02): docker-compose.yml with env_file secrets, DNS fix, named volume; update .gitignore

- env_file: .env.production — secrets injected at runtime, not baked into image
- dns array [8.8.8.8, 1.1.1.1] + NODE_OPTIONS=--dns-result-order=ipv4first for SMTP EAI_AGAIN fix
- Named volume uploads:/app/uploads persists PDFs across container restarts
- restart: unless-stopped, port 3000:3000
- .gitignore: added /uploads/ entry for production Docker volume path

teressa-copeland-homes/docker-compose.yml

@@ -0,0 +1,20 @@
+services:
+  app:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    restart: unless-stopped
+    ports:
+      - "3000:3000"
+    env_file:
+      - .env.production
+    environment:
+      - NODE_OPTIONS=--dns-result-order=ipv4first
+    dns:
+      - 8.8.8.8
+      - 1.1.1.1
+    volumes:
+      - uploads:/app/uploads
+
+volumes:
+  uploads: