upstream adminer_backend {
    server adminer:8080;
    # Keep up to 16 idle connections per worker
    keepalive 16;
    # Maximum time a connection can be idle
    keepalive_timeout 60s;
    # Maximum requests per keepalive connection
    keepalive_requests 100;
}

server {
    listen 80;
    listen [::]:80;
    server_name adminer.novicelab.io;
    
    # ACME challenge for Let's Encrypt certificate renewal
    location /.well-known/acme-challenge/ {
        root /var/www/certbot;
    }
    
    location / {
        return 301 https://$server_name$request_uri;
    }
}

server {
    listen 443 ssl;
    listen [::]:443 ssl;
    http2 on;
    server_name adminer.novicelab.io;

    # SSL
    ssl_certificate /etc/letsencrypt/live/novicelab.io/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/novicelab.io/privkey.pem;
    ssl_trusted_certificate /etc/letsencrypt/live/novicelab.io/chain.pem;

    # 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;
    add_header Content-Security-Policy "default-src 'self' https: data: 'unsafe-inline' 'unsafe-eval';" always;
    add_header Strict-Transport-Security "max-age=63072000; includeSubDomains; preload" always;
    add_header Permissions-Policy        "interest-cohort=()" always;

    # Logging
    access_log /var/log/nginx/adminer.novicelab.io_access.log json_combined;
    error_log /var/log/nginx/adminer.novicelab.io_error.log debug;

    # set $adminer_backend adminer:8080; 

    location / {
        proxy_pass http://adminer_backend;
        
        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-Scheme $scheme;
        proxy_set_header X-Forwarded-Proto  $scheme;
        proxy_set_header X-Forwarded-Host   $http_host;
        proxy_set_header X-Forwarded-Port   $server_port;
    }
}