Add cache and PR preview

Author: marcoacierno

.github/workflows/deploy.yml

@@ -6,11 +6,15 @@ on:
       - master
 
 jobs:
-  build:
+  deploy:
     runs-on: ubuntu-latest
 
     steps:
       - uses: actions/checkout@v1
+      - uses: actions/cache@v2
+        with:
+          path: "**/node_modules"
+          key: ${{ runner.os }}-modules-${{ hashFiles('**/yarn.lock') }}
       - name: Install dependencies
         run: yarn
       - name: Build website

.github/workflows/preview.yml

@@ -0,0 +1,56 @@
+name: Preview
+
+on: pull_request
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v1
+      - uses: actions/cache@v2
+        with:
+          path: "**/node_modules"
+          key: ${{ runner.os }}-modules-${{ hashFiles('**/yarn.lock') }}
+      - name: Install dependencies
+        run: yarn
+      - name: Build website
+        run: yarn build
+      - uses: netlify/actions/cli@master
+        id: deploy-neflify
+        with:
+          args: deploy --dir=build/
+        env:
+          NETLIFY_AUTH_TOKEN: ${{ secrets.NETLIFY_AUTH_TOKEN }}
+          NETLIFY_SITE_ID: ${{ secrets.NETLIFY_SITE_ID }}
+      - name: Find Deploy Comment
+        uses: peter-evans/find-comment@v1
+        id: find_comment
+        with:
+          token: ${{ secrets.BOT_TOKEN }}
+          issue-number: ${{ github.event.number }}
+          comment-author: pythonpizzabot
+      - name: Create comment
+        uses: peter-evans/create-or-update-comment@v1
+        if: ${{ steps.find_comment.outputs.comment-id == null }}
+        with:
+          token: ${{ secrets.BOT_TOKEN }}
+          issue-number: ${{ github.event.number }}
+          body: |
+            This pull request is being automatically deployed to Netlify.
+
+            🔍 Inspect: ${{ steps.deploy-neflify.outputs.NETLIFY_LOGS_URL }}
+            ✅ Preview: ${{ steps.deploy-neflify.outputs.NETLIFY_URL }}
+      - name: Update comment
+        uses: peter-evans/create-or-update-comment@v1
+        if: ${{ steps.find_comment.outputs.comment-id != null }}
+        with:
+          token: ${{ secrets.BOT_TOKEN }}
+          issue-number: ${{ github.event.number }}
+          edit-mode: replace
+          comment-id: ${{ steps.find_comment.outputs.comment-id }}
+          body: |
+            This pull request is being automatically deployed to Netlify.
+
+            🔍 Inspect: ${{ steps.deploy-neflify.outputs.NETLIFY_LOGS_URL }}
+            ✅ Preview: ${{ steps.deploy-neflify.outputs.NETLIFY_URL }}