feat: add generative proxy with usage metrics

deploy/nginx.conf

@@ -0,0 +1,16 @@
+# Include these directives in the HTTPS server block. Configure TLS separately.
+client_max_body_size 52m;
+proxy_connect_timeout 300s;
+proxy_send_timeout 300s;
+proxy_read_timeout 300s;
+send_timeout 300s;
+
+location / {
+    proxy_pass http://127.0.0.1:8000;
+    proxy_http_version 1.1;
+    proxy_set_header Connection "";
+    proxy_set_header Host $host;
+    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;
+}