feat: add infra README

Author: nmattia

infra/README.md

@@ -0,0 +1,35 @@
+# DeckDeckGo - Infrastructure
+
+This project is the infrastructure of [DeckDeckGo].
+
+The infrastructure is deployed with [Terraform] and runs on [AWS Lambda].
+
+## Getting started
+
+**requirements: [Nix]**
+
+To (re)deploy the infrastructure, run the following commands:
+
+``` shell
+$ cd infra/
+$ nix-shell
+$ terraform apply
+```
+
+Running `nix-shell` drops you in a shell where all the dependencies are
+available. Running `terraform apply` will package everything needed by the
+lambda function and upload it to AWS. **NOTE**: if you are deploying from a new
+machine you may need to run `terraform init`.
+
+## Table of contents
+
+- [License](#license)
+
+## License
+
+MIT © [David Dal Busco](mailto:[email protected]) and [Nicolas Mattia]([email protected])
+
+[DeckDeckGo]: https://deckdeckgo.com
+[Terraform]: https://www.terraform.io/
+[AWS Lambda]: https://aws.amazon.com/lambda/
+[Nix]: https://nixos.org/nix/