https://instances.mastodon.xyz/ で HTTPS/Obs を A+ にする例

mastodon.conf

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

server {
  listen 80;
  listen [::]:80;
  server_name mst.dolpen.net;
  return 301 https://$host$request_uri;
}

server {
  listen 443 ssl;
  listen [::]:443 ssl;
  server_name mst.dolpen.net;

  ssl_protocols TLSv1.2;
  ssl_prefer_server_ciphers on;
  ssl_ciphers EECDH+AESGCM:EECDH+CHACHA20:EECDH+AES;
  ssl_ecdh_curve secp384r1;
  # if nginx 1.10+
  #ssl_ecdh_curve sect571r1:secp521r1:brainpoolP512r1:secp384r1; 
  ssl_certificate     /etc/letsencrypt/live/mst.dolpen.net/fullchain.pem;
  ssl_certificate_key /etc/letsencrypt/live/mst.dolpen.net/privkey.pem;
  ssl_session_cache shared:SSL:10m;
  ssl_session_timeout 10m;
  ssl_trusted_certificate /etc/letsencrypt/live/mst.dolpen.net/fullchain.pem;
  ssl_stapling on;
  ssl_stapling_verify on;
  keepalive_timeout    70;
  sendfile             on;
  client_max_body_size 0;

  root /home/mastodon/live/public;

  gzip on;
  gzip_disable "msie6";
  gzip_vary on;
  gzip_proxied any;
  gzip_comp_level 6;
  gzip_buffers 16 8k;
  gzip_http_version 1.1;
  gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;

  add_header Strict-Transport-Security "max-age=31536000";
  # known: error at embedded-style in react components.
  add_header Content-Security-Policy "default-src 'none'; style-src 'self' https://mst.dolpen.net; script-src 'self' https://mst.dolpen.net; img-src 'self' https://mst.dolpen.net data:; connect-src 'self' wss://mst.dolpen.net; font-src 'self'; frame-ancestors 'none'; media-src 'self';";
  location =/auth {
    return 402;
  }



  location / {
    try_files $uri @proxy;
  }


  location @proxy {
    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 https;
    proxy_set_header Proxy "";
    proxy_pass_header Server;

    proxy_pass http://127.0.0.1:3000;
    proxy_buffering off;
    proxy_redirect off;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection $connection_upgrade;

    tcp_nodelay on;
  }

  location /api/v1/streaming {
    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 https;
    proxy_set_header Proxy "";

    proxy_pass http://localhost:4000;
    proxy_buffering off;
    proxy_redirect off;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection $connection_upgrade;

    tcp_nodelay on;
  }

  error_page 500 501 502 503 504 /500.html;
}