nginx.conf

# NGINX Configuration for Nova Rewards with SSL/TLS
# This configuration handles HTTPS-only traffic with automatic redirects
# and implements HSTS for enhanced security.

# Upstream backend service
upstream nova_backend {
    server backend:4000;
    keepalive 32;
}

# Redirect HTTP to HTTPS (301 permanent redirect)
server {
    listen 80;
    listen [::]:80;
    server_name api.nova-rewards.xyz;

    # Allow Let's Encrypt ACME challenges
    location /.well-known/acme-challenge/ {
        root /var/www/certbot;
    }

    # Redirect all other traffic to HTTPS
    location / {
        return 301 https://$server_name$request_uri;
    }
}

# HTTPS server block
server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name api.nova-rewards.xyz;

    # SSL Certificate paths (managed by Certbot)
    ssl_certificate /etc/letsencrypt/live/api.nova-rewards.xyz/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/api.nova-rewards.xyz/privkey.pem;

    # SSL Configuration - Modern TLS 1.2+
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers HIGH:!aNULL:!MD5;
    ssl_prefer_server_ciphers on;
    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 10m;

    # HSTS (Strict-Transport-Security) - 1 year with subdomains
    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;

    # Additional 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;

    # Logging
    access_log /var/log/nginx/nova_access.log;
    error_log /var/log/nginx/nova_error.log;

    # Health check endpoint
    location /health {
        proxy_pass http://nova_backend;
        proxy_http_version 1.1;
        proxy_set_header Connection "";
        access_log off;
    }

    # API routes
    location /api/ {
        proxy_pass http://nova_backend;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header 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;
        proxy_buffering off;
        proxy_request_buffering off;
    }

    # Root path
    location / {
        proxy_pass http://nova_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;
    }
}