chore(discord-bot): create template server

- acts as the 3rd party app for the bot to communicate with

apps/discord-bot/template-server/.gitignore

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+node_modules
+config.json
+.DS_Store
+.env

apps/discord-bot/template-server/README.md

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+# Linked Role example app
+
+This repository contains the documentation and example for a linked role bot.
+
+> ❇️ A version of this code is also hosted [on Glitch 🎏](https://glitch.com/edit/#!/linked-role-discord-bot)
+
+## Project structure
+
+All of the files for the project are on the left-hand side. Here's a quick glimpse at the structure:
+
+```
+├── assets          -> Images used in this tutorial
+├── src
+│   ├── config.js   -> Parsing of local configuration
+│   ├── discord.js  -> Discord specific auth & API wrapper
+│   ├── register.js -> Tool to register the metadata schema
+│   ├── server.js   -> Main entry point for the application
+│   ├── storage.js  -> Provider for storing OAuth2 tokens
+├── .env -> your credentials and IDs
+├── .gitignore
+├── package.json
+└── README.md
+```
+
+## Running app locally
+
+Before you start, you'll need to [create a Discord app](https://discord.com/developers/applications) with the `bot` scope
+
+Configuring the app is covered in detail in the [tutorial](https://discord.com/developers/docs/tutorials/configuring-app-metadata-for-linked-roles).
+
+### Setup project
+
+First clone the project:
+
+```
+git clone https://github.com/discord/linked-roles-sample.git
+```
+
+Then navigate to its directory and install dependencies:
+
+```
+cd linked-roles-sample
+npm install
+```
+
+### Get app credentials
+
+Fetch the credentials from your app's settings and add them to a `.env` file. You'll need your bot token (`DISCORD_TOKEN`), client ID (`DISCORD_CLIENT_ID`), client secret (`DISCORD_CLIENT_SECRET`). You'll also need a redirect URI (`DISCORD_REDIRECT_URI`) and a randomly generated UUID (`COOKIE_SECRET`), which are both explained below:
+
+```
+DISCORD_CLIENT_ID: <your OAuth2 client Id>
+DISCORD_CLIENT_SECRET: <your OAuth2 client secret>
+DISCORD_TOKEN: <your bot token>
+DISCORD_REDIRECT_URI: https://<your-project-url>/discord-oauth-callback
+COOKIE_SECRET: <random generated UUID>
+```
+
+For the UUID (`COOKIE_SECRET`), you can run the following commands:
+
+```
+$ node
+crypto.randomUUID()
+```
+
+Copy and paste the value into your `.env` file.
+
+Fetching credentials is covered in detail in the [linked roles tutorial](https://discord.com/developers/docs/tutorials/configuring-app-metadata-for-linked-roles).
+
+### Running your app
+
+After your credentials are added, you can run your app:
+
+```
+$ node server.js
+```
+
+And, just once, you need to register you connection metadata schema. In a new window, run:
+
+```
+$ node src/register.js
+```
+
+### Set up interactivity
+
+The project needs a public endpoint where Discord can send requests. To develop and test locally, you can use something like [`ngrok`](https://ngrok.com/) to tunnel HTTP traffic.
+
+Install ngrok if you haven't already, then start listening on port `3000`:
+
+```
+$ ngrok http 3000
+```
+
+You should see your connection open:
+
+```
+Tunnel Status                 online
+Version                       2.0/2.0
+Web Interface                 http://127.0.0.1:4040
+Forwarding                    http://1234-someurl.ngrok.io -> localhost:3000
+Forwarding                    https://1234-someurl.ngrok.io -> localhost:3000
+
+Connections                  ttl     opn     rt1     rt5     p50     p90
+                              0       0       0.00    0.00    0.00    0.00
+```
+
+Copy the forwarding address that starts with `https`, in this case `https://1234-someurl.ngrok.io`, then go to your [app's settings](https://discord.com/developers/applications).
+
+On the **General Information** tab, there will be an **Linked Roles Verification URL**. Paste your ngrok address there, and append `/linked-role` (`https://1234-someurl.ngrok.io/linked-role` in the example).
+
+You should also paste your ngrok address into the `DISCORD_REDIRECT_URI` variable in your `.env` file, with `/discord-oauth-callback` appended (`https://1234-someurl.ngrok.io/discord-oauth-callback` in the example). Then go to the **General** tab under **OAuth2** in your [app's settings](https://discord.com/developers/applications), and add that same address to the list of **Redirects**.
+
+Click **Save Changes** and restart your app.
+
+## Other resources
+
+- Read **[the tutorial](https://discord.com/developers/docs/tutorials/configuring-app-metadata-for-linked-roles)** for in-depth information.
+- Browse https://github.com/JustinBeckwith/fitbit-discord-bot/ for a more in-depth example using the Fitbit API
+- Join the **[Discord Developers server](https://discord.gg/discord-developers)** to ask questions about the API, attend events hosted by the Discord API team, and interact with other devs.