Add/update Plasmic push workflow

.github/workflows/plasmic-push.yml

@@ -0,0 +1,44 @@
+# Plasmic push workflow v1
+name: Build and deploy Plasmic app
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  job:
+    name: Build and deploy
+    runs-on: ubuntu-latest
+    steps:
+      - id: checkout
+        name: Check out repository
+        uses: actions/checkout@v2
+        with:
+          persist-credentials: false
+          fetch-depth: 0
+      - id: node
+        name: Set up node v14
+        uses: actions/setup-node@v2
+        with:
+          node-version: "14"
+      - id: cache
+        name: Recover cache
+        uses: actions/cache@v2
+        with:
+          key: lock-${{ hashFiles('package-lock.json', 'yarn.lock') }}
+          path: node_modules
+      - id: build
+        name: Build Plasmic app
+        uses: plasmicapp/plasmic-action@master
+        with:
+          run: build
+          branch: main
+          skip_if_plasmic: true
+      - id: gh-pages
+        name: Publish to GitHub Pages
+        uses: JamesIves/[email protected]
+        if: ${{ steps.build.outputs.publish_dir }}
+        with:
+          branch: gh-pages
+          folder: ${{ steps.build.outputs.publish_dir }}