Fix NGINX temp dirs and Blinko entry point

- Configure NGINX to use /run for temp directories
- Fix Blinko entry point to dist/index.js

nginx.conf

@@ -3,6 +3,13 @@ worker_processes auto;
 pid /run/nginx.pid;
 error_log stderr;
 
+# Use /run for temp directories (writable in Cloudron)
+client_body_temp_path /run/nginx-client-body;
+proxy_temp_path /run/nginx-proxy;
+fastcgi_temp_path /run/nginx-fastcgi;
+uwsgi_temp_path /run/nginx-uwsgi;
+scgi_temp_path /run/nginx-scgi;
+
 events {
     worker_connections 1024;
 }