fix: static assets MIME type and 404 handling in nginx.conf

nginx.conf

@@ -2,14 +2,22 @@ server {
     listen 80;
     server_name _;
 
-    location / {
+    root /usr/share/nginx/html;
+    index index.html;
+
+    # Ensure proper MIME types for JavaScript, CSS, etc.
+    include /etc/nginx/mime.types;
+
+    # Serve static assets directly
+    location /assets/ {
         root /usr/share/nginx/html;
-        index index.html index.htm;
-        try_files $uri $uri/ /index.html;
+        try_files $uri =404;
+        expires 30d;
+        add_header Cache-Control "public, no-transform";
     }
 
-    error_page 500 502 503 504 /5x.x.html;
-    location = /5x.x.html {
-        root /usr/share/nginx/html;
+    # SPA routing fallback for app routes
+    location / {
+        try_files $uri $uri/ /index.html;
     }
 }