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

server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;

    server_name esphome.ccchh.net;

    ssl_certificate /etc/letsencrypt/live/esphome.ccchh.net/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/esphome.ccchh.net/privkey.pem;
    # verify chain of trust of OCSP response using Root CA and Intermediate certs
    ssl_trusted_certificate /etc/letsencrypt/live/esphome.ccchh.net/chain.pem;

    add_header Strict-Transport-Security "max-age=63072000" always;

    location / {
        proxy_set_header Host $host;
        proxy_redirect http:// https://;
        proxy_http_version 1.1;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $connection_upgrade;
        proxy_pass http://localhost:6052;
    }
}