fix: resolution for nginx path routing, script_filename, and env fallback

Dockerfile

@@ -57,23 +57,26 @@ RUN chown -R www-data:www-data /var/www/html \
     && chmod -R 775 /var/www/html/storage \
     && chmod -R 775 /var/www/html/bootstrap/cache
 
-# Konfigurasi Nginx untuk mendukung path / dan /sidata
+# Konfigurasi Nginx presisi untuk subpath /sidata dan PHP-FPM
 RUN echo 'server { \
     listen 80; \
     index index.php index.html; \
     root /var/www/html/public; \
+    \
     location /sidata { \
-        alias /var/www/html/public; \
         try_files $uri $uri/ /sidata/index.php?$query_string; \
     } \
+    \
     location / { \
         try_files $uri $uri/ /index.php?$query_string; \
     } \
+    \
     location ~ \.php$ { \
         fastcgi_pass 127.0.0.1:9000; \
         fastcgi_index index.php; \
         include fastcgi_params; \
-        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; \
+        fastcgi_param SCRIPT_FILENAME /var/www/html/public/index.php; \
+        fastcgi_param SCRIPT_NAME $fastcgi_script_name; \
     } \
 }' > /etc/nginx/sites-available/default