fix: Add nginx configuration for SPA client-side routing

- Add nginx.conf with proper SPA routing configuration
- Update Dockerfile.client.prod to include nginx configuration
- Fixes 404 errors when reloading pages in production

Author: AlessGarau

Docker/Dockerfile.client.prod

@@ -27,3 +27,4 @@ RUN npm run build
 
 FROM nginx:alpine
 COPY --from=build /app/dist /usr/share/nginx/html
+COPY Docker/nginx.conf /etc/nginx/conf.d/default.conf

Docker/nginx.conf

@@ -0,0 +1,35 @@
+server {
+    listen 80;
+    listen [::]:80;
+    server_name localhost;
+
+    root /usr/share/nginx/html;
+    index index.html;
+
+    # Gestion des assets statiques
+    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+        try_files $uri =404;
+    }
+
+    # Fallback pour toutes les autres routes (SPA routing)
+    location / {
+        try_files $uri $uri/ /index.html;
+        
+        # Headers de sécurité
+        add_header X-Frame-Options "SAMEORIGIN" always;
+        add_header X-Content-Type-Options "nosniff" always;
+        add_header X-XSS-Protection "1; mode=block" always;
+    }
+
+    # Gestion des erreurs
+    error_page 404 /index.html;
+    
+    # Santé check
+    location /health {
+        access_log off;
+        return 200 "healthy\n";
+        add_header Content-Type text/plain;
+    }
+}