usability fixes

Dockerfile

@@ -42,6 +42,10 @@ FROM nginx:1.25.2-alpine
 # copy the info of the builded web app to nginx
 COPY --from=build-env /app/build/web /usr/share/nginx/html
 
+# Remove default nginx configuration and copy custom one
+RUN rm /etc/nginx/conf.d/default.conf
+COPY nginx.conf /etc/nginx/nginx.conf
+
 # Expose and run nginx
 EXPOSE 80
-CMD ["nginx", "-g", "daemon off;"]
+CMD ["nginx", "-g", "daemon off;"]

nginx.conf

@@ -0,0 +1,38 @@
+events {
+    worker_connections 1024;
+}
+
+http {
+    include /etc/nginx/mime.types;
+    default_type application/octet-stream;
+
+    server {
+        listen 80;
+        server_name _;
+        root /usr/share/nginx/html;
+        index index.html;
+
+        # Gzip compression
+        gzip on;
+        gzip_types text/plain text/css application/json application/javascript text/xml application/xml text/javascript image/svg+xml;
+        gzip_min_length 1000;
+
+        # Cache static assets
+        location ~* \.(?:ico|css|js|gif|jpe?g|png|woff2?|eot|ttf|svg|json)$ {
+            expires 6M;
+            access_log off;
+            add_header Cache-Control "public, immutable";
+        }
+
+        # Service worker - no cache
+        location = /flutter_service_worker.js {
+            expires -1;
+            add_header Cache-Control "no-store, no-cache, must-revalidate";
+        }
+
+        # SPA fallback: all requests that don't match a real file go to index.html
+        location / {
+            try_files $uri $uri/ /index.html;
+        }
+    }
+}