fix: resolve 404 by setting nixpacks root and simplifying nginx config

nginx.template.conf

@@ -2,7 +2,7 @@ server {
     listen 80;
     server_name _;
     root /app;
-    index index.php index.html index.htm;
+    index index.html index.php;
 
     # GZIP Compression
     gzip on;
@@ -14,29 +14,24 @@ server {
     # Browser Caching
     location ~* \.(jpg|jpeg|png|gif|webp|svg|ico|cur|gz|svgz|mp4|ogg|ogv|webm|htc)$ {
         expires 1y;
-        access_log off;
         add_header Cache-Control "public, max-age=31536000, immutable";
     }
 
     location ~* \.(css|js)$ {
         expires 1M;
-        access_log off;
         add_header Cache-Control "public, max-age=2592000, immutable";
     }
 
     location ~* \.(woff|woff2|ttf|otf|eot)$ {
         expires 1y;
-        access_log off;
         add_header Cache-Control "public, max-age=31536000, immutable";
     }
 
-    # HTML - Short cache
-    location ~* \.(html|htm)$ {
-        expires 1h;
-        add_header Cache-Control "public, max-age=3600, must-revalidate";
+    location / {
+        try_files $uri $uri/ /index.html /index.php?$query_string;
     }
 
-    # PHP Handling
+    # PHP Handling (Nixpacks default fastcgi path)
     location ~ \.php$ {
         fastcgi_pass 127.0.0.1:9000;
         fastcgi_index index.php;
@@ -44,9 +39,5 @@ server {
         include fastcgi_params;
     }
 
-    location / {
-        try_files $uri $uri/ /index.html /index.php?$query_string;
-    }
-
     error_page 404 /404.html;
 }

nixpacks.toml

@@ -0,0 +1,3 @@
+[variables]
+    NIXPACKS_PHP_ROOT_DIR = "/app"
+    NIXPACKS_PHP_FALLBACK_PATH = "/index.html"