Uptade README with more configuration instructions

README.md

@@ -12,6 +12,8 @@ following features:
 - Auth0, for authentication
 - PostHog, for analytics
 
+More details [here](https://docs.google.com/document/d/1UPcMZHZF0V_bencLmeDzq_7Sn9uIsaa0EP_Xj9qJ6T4/edit)
+
 ## Setup
 
 Locally, you just need to setup node like usual:
@@ -28,4 +30,22 @@ npm run dev
 
 ## Configuration
 
-Check the `.env.example` file for the environment variables you need to set.
+Check the `.env.example` file for the environment variables you need to set.
+
+### PostHog
+
+Create an account on PostHog website and then create a project. You will find your public key in Settings > General > Project ID
+
+### Auth0
+
+Create an account on Auth0 website and then create an application. Inside your applicaiton, in Settings > Basic Information, you will find your keys and credentials.
+It's important ot remember that the domain needs to contain the `https://` prefix to work properly.
+
+You also need to set the Allowed Callback URLs in the Application URIs section to `http://localhost:3000/api/auth/callback/auth0` for development.
+
+### Vercel and GitHub Actions
+
+The action is already setup to deploy to Vercel on any push or pull request, but the branch is not specified.
+If you want do deploy on a specific branch, you have to change the `build.yml` workflow file.
+
+Also, the repository secrets need to be set in the GitHub repository settings, following the names defined in the workflow file.