Add an installation script for Uptime Kuma

[Wernouxe]

Is your feature request related to a problem? Please describe.
There is no script for installing Uptime Kuma. Manual installation may be complicated or impossible (I try it).

Describe the solution you'd like
Add a script to install Uptime Kuma

Describe alternatives you've considered
None, in my opinion?

Additional context
A script would enable quick and easy installation for users.

• https://uptimekuma.org/
• https://github.com/louislam/uptime-kuma