nginx.conf

# ============================================
# Nginx Configuration for Jet Admin
# ============================================
# Serves frontend static files and proxies API/WebSocket requests

user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid;

events {
    worker_connections 1024;
    use epoll;
    multi_accept on;
}

http {
    include /etc/nginx/mime.types;
    default_type application/octet-stream;

    # Logging format
    log_format main '$remote_addr - $remote_user [$time_local] "$request" '
                    '$status $body_bytes_sent "$http_referer" '
                    '"$http_user_agent" "$http_x_forwarded_for"';
    access_log /var/log/nginx/access.log main;

    # Performance optimizations
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    types_hash_max_size 2048;

    # ============================================
    # Gzip Compression (ENABLED)
    # ============================================
    gzip on;
    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_min_length 1000;
    gzip_types 
        text/plain 
        text/css 
        text/xml 
        text/javascript 
        application/json 
        application/javascript 
        application/xml 
        application/xml+rss 
        application/x-javascript
        image/svg+xml
        font/ttf
        font/woff
        font/woff2;

    # ============================================
    # Rate Limiting
    # ============================================
    limit_req_zone $binary_remote_addr zone=api_limit:10m rate=10r/s;
    limit_req_zone $binary_remote_addr zone=general_limit:10m rate=30r/s;

    # ============================================
    # Upstream definitions
    # ============================================
    upstream backend {
        server localhost:8090;
        keepalive 32;
    }

    upstream webhook_backend {
        server localhost:8095;
        keepalive 32;
    }

    # ============================================
    # HTTPS Server (Port 443)
    # ============================================
    server {
        listen 443 ssl http2;
        listen [::]:443 ssl http2;
        server_name localhost;

        # SSL Configuration
        ssl_certificate /etc/nginx/ssl/nginx-selfsigned.crt;
        ssl_certificate_key /etc/nginx/ssl/nginx-selfsigned.key;
        ssl_protocols TLSv1.2 TLSv1.3;
        ssl_prefer_server_ciphers on;
        ssl_ciphers 'ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384';
        ssl_session_cache shared:SSL:10m;
        ssl_session_timeout 10m;

        # Security Headers
        add_header X-Frame-Options "SAMEORIGIN" always;
        add_header X-Content-Type-Options "nosniff" always;
        add_header X-XSS-Protection "1; mode=block" always;
        add_header Referrer-Policy "strict-origin-when-cross-origin" always;

        # Client body size limit
        client_max_body_size 50M;

        # ============================================
        # Frontend Static Files
        # ============================================
        location / {
            root /apps/frontend/dist;
            index index.html;
            try_files $uri $uri/ /index.html;
            
            limit_req zone=general_limit burst=50 nodelay;
            
            # Cache static assets
            location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
                expires 1y;
                add_header Cache-Control "public, immutable";
            }
        }

        # ============================================
        # Backend API Proxy
        # ============================================
        location /api {
            limit_req zone=api_limit burst=20 nodelay;
            
            proxy_pass http://backend;
            proxy_http_version 1.1;
            
            # Headers
            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;
            
            # Buffering
            proxy_buffering on;
            proxy_buffer_size 4k;
            proxy_buffers 8 4k;
        }

        # ============================================
        # Webhook Ingress Proxy
        # ============================================
        location /webhooks {
            limit_req zone=api_limit burst=20 nodelay;
            
            proxy_pass http://webhook_backend;
            proxy_http_version 1.1;
            
            # Headers
            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;
        }

        # ============================================
        # Socket.IO WebSocket Proxy
        # ============================================
        location /socket.io {
            proxy_pass http://backend;
            proxy_http_version 1.1;
            
            # WebSocket upgrade headers
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
            
            # Standard headers
            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;
            
            # WebSocket timeouts (longer for persistent connections)
            proxy_connect_timeout 60s;
            proxy_send_timeout 3600s;
            proxy_read_timeout 3600s;
            
            # Disable buffering for real-time
            proxy_buffering off;
            proxy_cache_bypass $http_upgrade;
        }

        # ============================================
        # Health Check Endpoint (for monitoring)
        # ============================================
        location /health {
            proxy_pass http://backend;
            proxy_http_version 1.1;
            proxy_set_header Host $host;
            
            # No rate limiting for health checks
            access_log off;
        }

        # ============================================
        # Monitor UI
        # ============================================
        location /monitor {
            proxy_pass http://backend;
            proxy_http_version 1.1;
            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;
        }
    }

    # ============================================
    # HTTP to HTTPS Redirect (Port 80)
    # ============================================
    server {
        listen 80;
        listen [::]:80;
        server_name localhost;
        
        location / {
            return 301 https://$host$request_uri;
        }
        
        # Allow health checks on HTTP
        location /health {
            proxy_pass http://backend;
            proxy_http_version 1.1;
            proxy_set_header Host $host;
        }
    }
}