[Features] Add Koyeb deployment support

[Nanandmic567]

Is your feature request related to a problem? Please describe.

Not by much, except adding more alternative deployment option.

Describe the solution you'd like

As the title said, Koyeb is an alternative solution to Heroku (which can do the same thing but better) and yes, they have one-click deploy button too
https://www.koyeb.com/docs/deploy-to-koyeb-button

Describe alternatives you've considered

As I said earlier, the Koyeb is the good alternative to Heroku and Glitch (which might become inactive when you closing it) so... that's it.

Additional context

Nothing, just nothing.