nginx.conf

# Nginx configuration for eCan.ai Web Deployment
#
# This configuration:
# - Serves the React frontend as static files
# - Proxies WebSocket connections to the backend
# - Handles SSL termination (when configured)

events {
    worker_connections 1024;
}

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

    # Logging
    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;
    error_log /var/log/nginx/error.log warn;

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

    # Gzip compression
    gzip on;
    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_types text/plain text/css text/xml application/json application/javascript 
               application/xml application/xml+rss text/javascript application/wasm;

    # WebSocket upgrade map
    map $http_upgrade $connection_upgrade {
        default upgrade;
        '' close;
    }

    # Upstream backend
    upstream ecan_backend {
        server ecan-backend:8765;
        keepalive 32;
    }

    server {
        listen 80;
        server_name localhost;

        # Frontend static files
        root /var/www/html;
        index index.html;

        # Redirect bare domain to marketing SPA entry
        location = / {
            return 302 /siteV2/;
        }

        # SPA routing - serve index.html for frontend entry
        location / {
            try_files $uri $uri/ /index.html;
        }

        # eCan marketing site (siteV2) with SPA fallback
        location /siteV2/ {
            try_files $uri $uri/ /siteV2/index.html;
        }

        # React dashboard bundle
        location /app/gui-v2/ {
            try_files $uri $uri/ /app/gui-v2/index.html;
        }

        # WebSocket endpoint
        location /ws {
            proxy_pass http://ecan_backend/ws;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection $connection_upgrade;
            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
            proxy_read_timeout 86400s;
            proxy_send_timeout 86400s;
            proxy_connect_timeout 60s;
        }

        # Health check endpoint
        location /health {
            proxy_pass http://ecan_backend/health;
            proxy_http_version 1.1;
            proxy_set_header Host $host;
        }

        # API endpoints (if any REST APIs are added later)
        location /api/ {
            proxy_pass http://ecan_backend/api/;
            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;
        }

        # Serve static assets with correct MIME types and caching
        location ~* ^/(siteV2|app/gui-v2)/.+\\.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
            try_files $uri =404;
            expires 7d;
            add_header Cache-Control "public, max-age=604800";
        }
    }

    # HTTPS server (uncomment and configure for production)
    # server {
    #     listen 443 ssl http2;
    #     server_name your-domain.com;
    #
    #     ssl_certificate /etc/nginx/certs/fullchain.pem;
    #     ssl_certificate_key /etc/nginx/certs/privkey.pem;
    #     ssl_protocols TLSv1.2 TLSv1.3;
    #     ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256;
    #     ssl_prefer_server_ciphers off;
    #
    #     # ... same location blocks as above ...
    # }
}