Document setup, environment variables and deployment in the README

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

README.md

@@ -2,12 +2,40 @@
 
 Inspired by the "[name 100 women challenge](https://knowyourmeme.com/memes/name-100-women-challenge)", this project is the same concept but limited to members of UiO Gaming, regardless of gender.
 
-## Get started
+## Setup
 
-Run:
+1. Create an application in the [Discord Developer Portal](https://discord.com/developers/applications).
+2. Under **OAuth2**, add `<NEXTAUTH_URL>/api/auth/callback/discord` as a redirect URL.
+3. Under **Bot**, create a bot, enable the **Server Members Intent**, and invite it to the UiO Gaming server. The bot only needs to be a member of the server; no extra permissions are required.
+4. Copy `env.example` to `.env` and fill in the values:
+
+| Variable                   | Description                                                           |
+| -------------------------- | --------------------------------------------------------------------- |
+| `DISCORD_CLIENT_ID`        | OAuth2 client ID of the Discord application                           |
+| `DISCORD_CLIENT_SECRET`    | OAuth2 client secret of the Discord application                       |
+| `DISCORD_BOT_TOKEN`        | Token of the bot user                                                 |
+| `DISCORD_GUILD_ID`         | ID of the UiO Gaming Discord server                                   |
+| `DISCORD_REQUIRED_ROLE_ID` | ID of the paying member role, required to log in and counted as valid |
+| `NEXTAUTH_SECRET`          | Random secret used to sign sessions, e.g. `openssl rand -base64 32`   |
+| `NEXTAUTH_URL`             | Public URL of the site, e.g. `http://localhost:3000`                  |
+
+## Development
 
 ```
+npm install
 npm run dev
 ```
 
-to start a development server. See NextJS' documentation for more details.
+starts a development server on http://localhost:3000. See the Next.js documentation for more details.
+
+Run `npm run lint` to lint the project.
+
+## Deployment
+
+The app is deployed with Docker Compose, which reads the environment variables from `.env`:
+
+```
+docker compose up -d --build
+```
+
+Pushing to `main` deploys automatically through the GitHub Actions workflow in `.github/workflows/deploy.yml`.