nginx-config/sites-available/drone

server {
  listen 443 ssl http2;
  server_name drone.kazu634.com;

  ssl_certificate /etc/lego/.lego/certificates/_.kazu634.com.crt;
  ssl_certificate_key /etc/lego/.lego/certificates/_.kazu634.com.key;
  ssl_dhparam /etc/lego/dhparams_4096.pem;

  ssl_session_timeout 1d;
  ssl_session_cache   shared:SSL:3m;
  ssl_buffer_size     4k;
  ssl_session_tickets off;

  ssl_protocols TLSv1.3 TLSv1.2;
  ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384;

  ssl_stapling on;
  ssl_stapling_verify on;

  resolver 8.8.4.4 8.8.8.8 valid=300s;
  resolver_timeout 10s;

  # Enable HSTS (HTTP Strict Transport Security)
  add_header Strict-Transport-Security "max-age=31536000; includeSubdomains; preload";

  access_log   /var/log/nginx/drone.access.log   json;
  error_log    /var/log/nginx/drone.error.log;

  proxy_set_header Host $host;
  proxy_set_header X-Real-IP $remote_addr;
  proxy_set_header X-Forwarded-Host $host;
  proxy_set_header X-Forwarded-Server $host;
  proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

  location / {
    proxy_pass http://192.168.10.245/;
  }
}