docs: Add documentation for self-hosting

[ajhalili2006]

Resolves https://github.com/wei/pull/issues/329

[codecov[bot]]

Codecov Report

Merging #330 (49ea93e) into master (f5e10f6) will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #330   +/-   ##
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  Coverage   100.00%   100.00%           
=========================================
  Files            3         3           
  Lines          120       120           
  Branches        28        28           
=========================================
  Hits           120       120           

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[wei]

Thanks for the PR, I'll review and merge once I get some time later this month~

[7126]

Help my account was hack these please been hacked my bank account please help

[KendallDoesCoding]

Help my account was hack these please been hacked my bank account please help

That's really sad to hear, although we can't do anything about it, please reach out to GitHub: https://support.github.com/request

[Milo123459]

Could this get a bump? @wei Just a quick suggestion, you could add a railway template URL for a one-click deploy.