config: set up nginx and static output for production deployment

astro.config.mjs

@@ -4,5 +4,6 @@ import { defineConfig } from 'astro/config';
 import tailwind from '@astrojs/tailwind';
 
 export default defineConfig({
+  output: 'static',
   integrations: [tailwind()]
 });

nginx.conf

@@ -0,0 +1,37 @@
+server {
+    listen 80 default_server;
+    listen [::]:80 default_server;
+
+    # Root directory for static files.
+    # This should match the directory where Astro's build output (e.g., from 'dist')
+    # is copied in your Dockerfile (e.g., COPY --from=builder /app/dist /usr/share/nginx/html).
+    root /usr/share/nginx/html;
+    index index.html index.htm;
+
+    # Serve Astro static site
+    location / {
+        try_files $uri $uri/ /index.html =404;
+    }
+
+    # Proxy API requests to the Node.js backend server.
+    # The Node.js server is expected to be running on localhost:3000 inside the container.
+    location /api/ { # Note the trailing slash here
+        proxy_pass http://localhost:3000/api/; # And here. This ensures /api/foo becomes http://localhost:3000/api/foo
+
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection 'upgrade'; # Important for WebSocket, etc.
+        proxy_set_header Host $host; # Preserves the original host header
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_cache_bypass $http_upgrade; # Useful for avoiding caching issues during development or for dynamic content
+    }
+
+    # Optional: Custom error pages
+    error_page 500 502 503 504 /50x.html;
+    location = /50x.html {
+        # Ensure you have a 50x.html file in your static assets root
+        root /usr/share/nginx/html;
+    }
+}