Adds deployment guide

Author: joshnuss

apps/docs/src/routes/+layout.svelte

@@ -11,6 +11,7 @@
     { url: '/session', name: 'Session' },
     { url: '/gating', name: 'Gating' },
     { url: '/endpoints', name: 'Endpoints' },
+    { url: '/deployment', name: 'Deployment' },
     { url: 'https://demo.airbadge.dev', name: 'Live Demo' },
     { url: 'https://github.com/airbadge-dev/airbadge-example', name: 'Example Code' },
     { url: '/license', name: 'License' }

apps/docs/src/routes/deployment/+page.md

@@ -0,0 +1,52 @@
+# Deployment
+
+This guide will walk you through setting up hosting with Vercel and GitHub.
+
+Note that AirBadge works with almost any hosting provider, including [Fly](https://fly.io), [Railway](https://railway.app), [Netlify](https://netlify.com), [Docker](https://docker.com), and many more.
+
+## Preparing
+
+Here's what you'll need:
+
+- A [Stripe account](https://dashboard.stripe.com/register). It's free to create.
+- A database. Create a free one using [Neon](https://pg.new) or [Vercel](https://vercel.com/docs/storage/vercel-postgres).
+- OAuth credentials (optional). See [Auth.js Instructions](https://authjs.dev/guides/configuring-oauth-providers).
+
+## Create a database
+
+The production database can be migrated via your local machine. Just specify your production `DATABASE_URL` on the command line:
+
+```bash
+DATABASE_URL=... pnpm prisma db push
+```
+
+## Setup OAuth Credentials
+
+This step is optional and only required if you are using OAuth.
+
+See [Auth.js's Guide](https://authjs.dev/getting-started/authentication/oauth) for more information about setting up OAuth providers.
+
+## Setup hosting
+
+The easiest way to set up hosting with Vercel is via a GitHub connection.
+
+1. Create a [new project](https://vercel.com/new).
+2. Import a GitHub repo.
+3. Setup environment variables (detailed below).
+
+### Environment Variables
+
+Select the project in Vercel, and go to Settings -> Environment Variables.
+
+Then you'll need the following variables:
+
+- `DOMAIN`: The base url of your app. For example: `https://example.tld`
+- `DATABASE_URL`: The URL to the database. For example: `postgresql://user:password@host:5432/dbname?schema=public`.
+- `SECRET_STRIPE_KEY`: Your secret Stripe key. Starts with `sk_prod_...`. Can be found in the Stripe Dashboard under [Developers -> API Keys](https://dashboard.stripe.com/apikeys)
+- `STRIPE_WEBHOOK_SECRET`: 
+- `AUTH_SECRET`: Generate it with `openssl rand -base64 33`
+- `AUTH_*`: OAuth provider credentials. For example, GitHub would need `AUTH_GITHUB_ID` & `AUTH_GITHUB_SECRET`.
+
+## Deploy
+
+Now anytime you push code to GitHub, it will automatically be deployed to Vercel.