Initial addon mkcert

[fjmk]

In https://github.com/docksal/docksal/pull/1274 is mentioned including mkcert in fin is not an option because the security concerns.

Maybe this is a possible solution?

• it installs mkcert as a global addon (is already possible: try fin addon install example --global) even when --global is not given.
• it installs the mkcert executable in $HOME/.docksal/bin/mkcert

But I am not sure it will install in all environments (Ubuntu, Centos, Mac, Windows, WSL) because the installation instructions mentions to install 'nss' also in all systems (in my desktop it was already installed).

What to do?

• Forget about it?
• Let the user install mkcert themself on their systems, just to avoid our responsibility?

PS: I modified my docksal/vhost-proxy image to redirect http to https.

[achekulaev]

Let's try and see. Can you write a short blog post about usage?