Add in .env.example for setting ports, fix upload limit, fix bounding box, can now dismiss previous image, change markdown expectation to HTML - not MD. updated README with nvidia driver/container instructions

frontend/nginx.conf

@@ -4,6 +4,9 @@ server {
     root /usr/share/nginx/html;
     index index.html;
 
+    # Allow larger file uploads (100MB)
+    client_max_body_size 100M;
+
     # Gzip compression
     gzip on;
     gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;