dehydrated
letsencrypt/acme client implemented as a shell-script
letsencrypt/acme client implemented as a shell-script, just add water. Dehydrated is a client for signing certificates with an ACME-server (e.g. Let’s Encrypt or ZeroSSL) implemented as a relatively simple bash script. It uses the OpenSSL utility for everything related to actually handling keys and certificates, so you need to have that installed.