feat: add comprehensive GitHub workflow and development tools

deploy-production/nginx.conf

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+server {
+    listen 80;
+    server_name 217.154.84.225 your-domain.com;
+
+    # Security headers
+    add_header X-Frame-Options "SAMEORIGIN" always;
+    add_header X-XSS-Protection "1; mode=block" always;
+    add_header X-Content-Type-Options "nosniff" always;
+    add_header Referrer-Policy "no-referrer-when-downgrade" always;
+    add_header Content-Security-Policy "default-src 'self' http: https: data: blob: 'unsafe-inline'" always;
+
+    # Rate limiting
+    limit_req_zone $binary_remote_addr zone=one:10m rate=10r/m;
+    limit_req zone=one burst=20 nodelay;
+
+    # Static files
+    location /static/ {
+        alias /opt/stiftung/app/static/;
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+    }
+
+    location /media/ {
+        alias /opt/stiftung/app/media/;
+        expires 1y;
+        add_header Cache-Control "public";
+    }
+
+    # Django application
+    location / {
+        proxy_pass http://127.0.0.1:8000;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        
+        # Timeouts
+        proxy_connect_timeout 60s;
+        proxy_send_timeout 60s;
+        proxy_read_timeout 60s;
+        
+        # Buffer settings
+        proxy_buffering on;
+        proxy_buffer_size 128k;
+        proxy_buffers 4 256k;
+        proxy_busy_buffers_size 256k;
+    }
+
+    # Gramps Web (optional)
+    location /gramps/ {
+        proxy_pass http://127.0.0.1:5000/;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+    }
+
+    # Health check endpoint
+    location /health/ {
+        access_log off;
+        return 200 "healthy\n";
+        add_header Content-Type text/plain;
+    }
+
+    # Block access to sensitive files
+    location ~ /\. {
+        deny all;
+    }
+
+    location ~ ^/(\.env|docker-compose|Dockerfile) {
+        deny all;
+    }
+}
+
+# Redirect HTTP to HTTPS (add after SSL setup)
+# server {
+#     listen 80;
+#     server_name 217.154.84.225 your-domain.com;
+#     return 301 https://$server_name$request_uri;
+# }