docker-compose.yml - This stores information about what containers are needed, how those containers are connected, and where data should be stored
builds - These are custom Dockerfiles that are utilized in the compose file
env - These contain environment files (used to set passwords and other sensitive information, I have redacted these)
data - Once all of the docker containers referenced in the compose file are started, persistent storage is created here

Service Overview

Within the docker-compose file, several services are started, namely:

Nextcloud (Cloud Storage + Collaboration Suite)
Syncthing (P2P File Synchronization)
Gitea (Git Server)
FreshRSS (RSS Aggregator)
Heimdall (Personal Dashboard)

Access to these services is mediated with HTTPS via Nginx Proxy and the Let's Encrypt Companion. With these, it is trivial to add new services; all you need to add a new service is declare these environment variables in the target container:

VIRTUAL_HOST - set this to domain name (sub.domain.example.com)
LETSENCRYPT_HOST - also set this to domain name (sub.domain.example.com)
LETSENCRYPT_EMAIL - email to be used in Let's Encrypt SSL request; this is kept on record by Let's Encrypt

Setup

For details on how to turn this into a working production environment, see setup.org.

Maintenance

For more details on maintaining this environment, see maintenance.org.