What is the purpose of this?

Use these folders to determine which example docker compose files suit your deployment needs.

nginx-proxy-with-letsencrypt

Can be used to setup a reverse proxy with absolutely free SSL & TLS 1.2 setup via Let's Encrypt. It should save you at least the SSL costs. I use it for hosting 2/3/4 different web applications within one $5 Linode VPS.

container-management-via-portainer

Simplistic container management UI via portainer. It's a cool way to see what state your server containers are in, view their logs, restart them etc...