Update README.md

.env.example

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+KEY_ID=
+PRIVATE_KEY=
+WALLET_ADDRESS=
+REDIRECT_URL=
+INTERLEDGER_PAY_HOST=
+SESSION_COOKIE_SECRET_KEY=

README.md

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 # Interledger Pay
+
+<a href="#interledger-pay">
+  <img src="https://github.com/interledger/testnet/assets/117268143/54e6478d-7c6e-4aa4-a325-ec0ea8f507bb" width="920" alt="Interledger Pay">
+</a>
+
+## What is Interledger Pay?
+
+Interledger Pay is a simplified payments platform, where you can easily send or request money from anyone anywhere in the world, if you own a Wallet Address.
+A Wallet Address is a standardized identifier for a payment account. In the same way that an email address provides an identifier for a mailbox in the email ecosystem, a wallet address is used by an account holder to share the details of their account with a counter-party. If you don't already own one, you can create one at [Interledger Test Wallet](https://rafiki.money).
+
+See Interledger Pay in action [here](https://interledgerpay.com).
+
+### New to Interledger?
+
+Never heard of Interledger before, or you would like to learn more? Here are some good places to start:
+
+- [Interledger Website](https://interledger.org/)
+- [Interledger Specs](https://interledger.org/rfcs/0027-interledger-protocol-4/)
+- [Interledger Explainer Video](https://twitter.com/Interledger/status/1567916000074678272)
+- [Open Payments](https://openpayments.guide/)
+- [Web monetization](https://webmonetization.org/)
+- [Interledger Test Wallet](https://rafiki.money)
+- [Interledger Boutique](https://rafiki.boutique)
+
+## Contributing
+
+Please read the [contribution guidelines](.github/contributing.md) before submitting contributions. All contributions must adhere to our [code of conduct](.github/CODE_OF_CONDUCT.md).
+
+## Local Development Environment
+
+### Prerequisites
+
+- [NVM](https://github.com/nvm-sh/nvm)
+
+### Environment Setup
+
+```sh
+# Install Node > 20
+nvm install lts/iron
+nvm use lts/iron
+
+# Install pnpm using Corepack
+corepack enable
+```
+
+If you do not have `corepack` installed locally you can use `npm` or `yarn` to install `pnpm`:
+
+```sh
+npm install pnpm -g
+# or
+yarn install pnpm -g
+```
+
+For alternative methods of installing `pnpm`, you can refer to the [official `pnpm` documentation](https://pnpm.io/installation).
+
+To install dependencies, execute:
+
+```sh
+pnpm i
+```
+
+### Environment Variables
+
+In order for the Interledger Pay to function, it is necessary to configure the environment variables appropriately. You must duplicate the example environment file, `.env.example`, into your local environment file, `.env`.
+
+> **Note**
+> The local environment file (`.env`) is **NOT** tracked in the version control system, and should **NOT** be included in any commits.
+
+Navigate to the project's root directory and enter the following command:
+
+```sh
+cp ./docker/dev/.env.example ./docker/dev/.env
+```
+
+Using your preferred text editor, open the `./docker/dev/.env` file and configure the necessary environment variables.
+
+You will need to create a USD wallet address in the [Test Wallet](https://rafiki.money) application, then generate public and private key for the wallet address in the `Developer Keys` found in the `Settings` menu of Interledger Test Wallet. With the generated values you can proceed to update the following environment variables: `PRIVATE_KEY` to the generated base64 encoded private key, `KEY_ID` to the wallet address key id, and `WALLET_ADDRESS` to the created wallet address.
+
+`REDIRECT_URL` variable is the url for the interaction with the Identity Provider Page, in our case, localy this would be `http://localhost:3000/finish`. `INTERLEDGER_PAY_HOST` is the url where Interledger Pay is hosted, localy the value is `http://localhost:3000`. We are using cookies to store some data, so a cookie secret key needs to be set in `SESSION_COOKIE_SECRET_KEY`.
+
+### Local Interledger Pay
+
+Navigate to the project's root directory and execute:
+
+```sh
+pnpm dev
+```
+
+Upon executing the above command, the following will be available
+
+- Interledger Pay application at [http://localhost:3000](http://localhost:3000)