Merge pull request #4 from TulioHRC/feature/library

Feature/library

backend/README.md

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+# Backend
+
+My first experience with Typescript, NestJS and PostGres, so it's almost everything in the backend new to me (but typescript is 99% equals to JS).
+
+I used as reference, ChatGPT (for explanations), NestJS documentation (PostGres and TypeORM on this link: https://docs.nestjs.com/recipes/sql-typeorm) and some videos on youtube.
+
+### What I understood in the backend?
+
+src/controllers -> Basically the controllers that I would use in express for the HTTP requests
+src/entity -> Schema of the table of my database
+src/modules -> Organization of the different types of data, to be imported in the app
+src/providers -> Creates the instacies to be injected in another components like services, modules and controllers
+src/services -> Functions to be imported
+src/app.module.ts -> Full organization of the modules, controllers and providers
+src/main.ts -> The first executed file of the server, being its duty to open connection of the server
+
+So basically, the backend will only provide information for the frontend like an own API.