Add support for running profiling when debug build-tags provided

[NyaaaWhatsUpDoc]

wrap root HTTP handler in debug.WithPprof(), rearrange router.Start() to support this

[NyaaaWhatsUpDoc]

If you run script/build.sh with DEBUG=1 or any non-empty value then it will compile gotosocial with an extra build-tag debugenv.

What this will mean is that if you run gotosocial with the environment variable DEBUG=1 or again, any non-empty value, profiling will be active and available under "/debug/pprof". Obviously a security risk which it's behind 2 separate steps to enable it 😁

[tsmethurst]

Looks good to me! Don't forget to add your library dependencies to the README.md if you want to :) If you'd rather not, then go ahead and merge

[NyaaaWhatsUpDoc]

Looks good to me! Don't forget to add your library dependencies to the README.md if you want to :) If you'd rather not, then go ahead and merge

ah yes i shall do! is it alright if i just use this PR to add all the libraries of mine that are missing?