Fix NGINX config and Blinko working directory

- Move temp path directives into http block
- Set working directory to /app/data for Blinko
- Add BLINKO_DATA_PATH environment variable

nginx.conf

@@ -3,18 +3,18 @@ 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;
 }
 
 http {
+    # 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;
+
     include /etc/nginx/mime.types;
     default_type application/octet-stream;