feat: Refactor Docker configurations and server logic

Removes redundant Dockerfiles and configurations, consolidating them into a single set. Updates server logic for handling expense shares and notice targets to ensure correct parsing and deletion of associated records. Introduces a check for family association in the user's profile to prevent rendering payment options when a family is not assigned.

nginx.conf

@@ -1,38 +0,0 @@
-worker_processes 1;
-
-events { worker_connections 1024; }
-
-http {
-    include       mime.types;
-    default_type  application/octet-stream;
-    sendfile        on;
-    keepalive_timeout  65;
-
-    server {
-        listen 80;
-        root /usr/share/nginx/html;
-        index index.html;
-
-        # Limite upload per allegati (es. foto/video ticket) - Allineato con il backend
-        client_max_body_size 50M;
-
-        # 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;
-        }
-    }
-}