> For the complete documentation index, see [llms.txt](https://docs.ionicfirebaseapp.com/online-grocery-shopping-and-delivery-system/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ionicfirebaseapp.com/online-grocery-shopping-and-delivery-system/api-backend.md).

# API Backend

- [NestJS installation](https://docs.ionicfirebaseapp.com/online-grocery-shopping-and-delivery-system/api-backend/nestjs-installation.md): Follow the brief explaination of NestJS installation as given below.
- [Api setup](https://docs.ionicfirebaseapp.com/online-grocery-shopping-and-delivery-system/api-backend/api-setup.md): It gives information about how to set up the API and its environment variables.
- [Run API](https://docs.ionicfirebaseapp.com/online-grocery-shopping-and-delivery-system/api-backend/run-api.md): To run and release the build follow these below commands.
- [MongoDB setup](https://docs.ionicfirebaseapp.com/online-grocery-shopping-and-delivery-system/api-backend/mongodb-setup.md): This App uses Mongo DB as a backed to read and to save the data.