Deploy website to Github Pages

This gets rid of netlify which we don't really need and is blocking PRs like #783
This contains two different parts:
- A step that deploys to a preview for PRs
- A step that deploys on a push to main

.github/workflows/publish-page.yml

@@ -0,0 +1,41 @@
+# .github/workflows/preview.yml
+name: Deploy Github Pages
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    types:
+      - opened
+      - reopened
+      - synchronize
+      - closed
+
+concurrency: ci-${{ github.ref }}
+
+jobs:
+  publish:
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Install and Build
+        working-directory: docs
+        run: |
+          yarn install
+          yarn build
+
+      - name: Deploy main
+        if: github.event_name != 'pull_request'
+        uses: JamesIves/github-pages-deploy-action@v4
+        with: 
+          clean-exclude: pr-preview/
+          folder: ./docs/build/
+
+      - name: Deploy preview
+        if: github.event_name == 'pull_request'
+        uses: rossjrw/pr-preview-action@v1
+        with:
+          source-dir: ./docs/build/