add workflow for preview deployments

.github/workflows/preview.yml

@@ -0,0 +1,30 @@
+name: Preview Build
+on: pull_request
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    name: Deploy Preview
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v2
+        with:
+          node-version: "18"
+      - name: Build
+        run: npm install && npm run build
+      - name: Publish
+        id: publish
+        uses: cloudflare/[email protected]
+        with:
+          apiToken: ${{ secrets.CF_API_TOKEN }}
+          accountId: ${{ secrets.CF_ACCOUNT_ID }}
+          command: pages publish build --project-name=discord-resources-wiki --branch=pr-${{ github.run_id }} --commit-dirty=true &> output.txt && [[ $(cat output.txt) =~ https://[0-9a-z]+\.[a-z0-9A-Z-]+\.pages\.dev ]] && echo "::set-output name=stdout::$BASH_REMATCH"
+
+      - name: Comment PR
+        if: always()
+        uses: thollander/actions-comment-pull-request@v1
+        with:
+          message: |
+            Test Deployment:
+            ${{steps.publish.outputs.stdout}}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}