docs: update readme and bootstrap

[TED Vortex (Teodor-Eugen Duțulescu)]

Not enough documentation/Readme.md. The goal was for everything to be able to run via install and run command, then let the backend be tested via swagger, and not all technical decisions were reasoned well like nestjs, typeorm, swagger, fastify. The TL;DR there is that I wanted a somewhat good developer experience when running the backend, akin to a feature MVP or in-progress pull request/dev branch.