# Optionally define the cert provider. Set to `zerossl` for ZeroSSL certs (requires existing [ZeroSSL account](https://app.zerossl.com/signup) and the e-mail address entered in `EMAIL` env var). Otherwise defaults to Let's Encrypt.
- CERTPROVIDER=# optional
# Required if `VALIDATION` is set to `dns`. Options are `aliyun`, `cloudflare`, `cloudxns`, `cpanel`, `desec`, `digitalocean`, `directadmin`, `dnsimple`, `dnsmadeeasy`, `domeneshop`, `gandi`, `gehirn`, `google`, `he`, `hetzner`, `inwx`, `ionos`, `linode`, `luadns`, `netcup`, `njalla`, `nsone`, `ovh`, `rfc2136`, `route53`, `sakuracloud`, `transip` and `vultr`. Also need to enter the credentials into the corresponding ini (or json for some plugins) file under `/config/dns-conf`.
# Required if `VALIDATION` is set to `dns`. Options are `aliyun`, `cloudflare`, `cloudxns`, `cpanel`, `desec`, `digitalocean`, `directadmin`, `dnsimple`, `dnsmadeeasy`, `dnspod`, `domeneshop`, `gandi`, `gehirn`, `google`, `he`, `hetzner`, `inwx`, `ionos`, `linode`, `luadns`, `netcup`, `njalla`, `nsone`, `ovh`, `rfc2136`, `route53`, `sakuracloud`, `transip` and `vultr`. Also need to enter the credentials into the corresponding ini (or json for some plugins) file under `/config/dns-conf`.
- DNSPLUGIN=cloudflare# optional
# Optionally override (in seconds) the default propagation time for the dns plugins.
-e VALIDATION=http `# Certbot validation method to use, options are `http`, `dns` or `duckdns` (`dns` method also requires `DNSPLUGIN` variable set) (`duckdns` method requires `DUCKDNSTOKEN` variable set, and the `SUBDOMAINS` variable must be either empty or set to `wildcard`).` \
-e SUBDOMAINS=www, `# optional` `# Subdomains you'd like the cert to cover (comma separated, no spaces) ie. `www,ftp,cloud`. For a wildcard cert, set this _exactly_ to `wildcard` (wildcard cert is available via `dns` and `duckdns` validation only)` \
-e CERTPROVIDER=`# optional` `# Optionally define the cert provider. Set to `zerossl` for ZeroSSL certs (requires existing [ZeroSSL account](https://app.zerossl.com/signup) and the e-mail address entered in `EMAIL` env var). Otherwise defaults to Let's Encrypt.` \
-e DNSPLUGIN=cloudflare `# optional` `# Required if `VALIDATION` is set to `dns`. Options are `aliyun`, `cloudflare`, `cloudxns`, `cpanel`, `desec`, `digitalocean`, `directadmin`, `dnsimple`, `dnsmadeeasy`, `domeneshop`, `gandi`, `gehirn`, `google`, `he`, `hetzner`, `inwx`, `ionos`, `linode`, `luadns`, `netcup`, `njalla`, `nsone`, `ovh`, `rfc2136`, `route53`, `sakuracloud`, `transip` and `vultr`. Also need to enter the credentials into the corresponding ini (or json for some plugins) file under `/config/dns-conf`.` \
-e DNSPLUGIN=cloudflare `# optional` `# Required if `VALIDATION` is set to `dns`. Options are `aliyun`, `cloudflare`, `cloudxns`, `cpanel`, `desec`, `digitalocean`, `directadmin`, `dnsimple`, `dnsmadeeasy`, `dnspod`, `domeneshop`, `gandi`, `gehirn`, `google`, `he`, `hetzner`, `inwx`, `ionos`, `linode`, `luadns`, `netcup`, `njalla`, `nsone`, `ovh`, `rfc2136`, `route53`, `sakuracloud`, `transip` and `vultr`. Also need to enter the credentials into the corresponding ini (or json for some plugins) file under `/config/dns-conf`.` \
-e PROPAGATION=`# optional` `# Optionally override (in seconds) the default propagation time for the dns plugins.` \
-e DUCKDNSTOKEN=`# optional` `# Required if `VALIDATION` is set to `duckdns`. Retrieve your token from https://www.duckdns.org` \
-e EMAIL=`# optional` `# Optional e-mail address used for cert expiration notifications (Required for ZeroSSL).` \