Caddy can provide out of the box support for things such as:
- Automatic HTTPS using Let's Encrypt
- Markdown rendering
- Site search
- Static site generation via Hugo
- Site deployment via git
- File manager
Configuration is done via Caddyfile and is meant to be simple.
Caddy's source code is under Apache 2 license. Official binaries are only free for private use, commercial users have to pay. (Nothing forbids users from obtaining binaries somewhere else or compiling their own).