feat: Implement Docker build and serving setup

Adds Dockerfile for frontend and backend, along with Nginx configuration and .dockerignore files. This enables containerized deployment and proper handling of static assets and API proxying. Updates mockDb.ts to correctly type ticket attachments.

nginx.txt

@@ -0,0 +1,39 @@
+
+worker_processes 1;
+
+events { worker_connections 1024; }
+
+http {
+    include       mime.types;
+    default_type  application/octet-stream;
+    sendfile        on;
+    keepalive_timeout  65;
+    
+    # Limite upload per allegati (es. foto/video ticket)
+    client_max_body_size 50M;
+
+    server {
+        listen 80;
+        root /usr/share/nginx/html;
+        index index.html;
+
+        # Compressione Gzip
+        gzip on;
+        gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;
+
+        # Gestione SPA (React Router)
+        location / {
+            try_files $uri $uri/ /index.html;
+        }
+
+        # Proxy API verso il backend
+        location /api/ {
+            proxy_pass http://backend:3001;
+            proxy_http_version 1.1;
+            proxy_set_header Upgrade $http_upgrade;
+            proxy_set_header Connection 'upgrade';
+            proxy_set_header Host $host;
+            proxy_cache_bypass $http_upgrade;
+        }
+    }
+}