* [docs] Describe how to block IPs using a firewall
This adds some documentation on how to block one, multiple or whole IP
ranges using the firewall. This can be helpful to protect from DDoS
attacks or block certain parties from being able to communicate with
your instance at all.
* [docs] Fix indenting of nft rule
* [docs] Split iptables and nftables into sections
* [docs] Add a certificates guide in Advanced
This adds some documentation about the process of getting certificates
through ACME in general. It also provides a number of links to
alternative clients and certbot deployment guides that are up to date.
Slightly restructure the NGINX and Apache reverse proxy documentation
and insert mentions to the Provisioning TLS certificates advanced
documentation in them.
* [docs] Add firewall section in Advanced
* [docs] Add new guides to section indexes
* [docs] Fix spelling issue
* [docs] Fix a few typos