Run demo GitHub Action in parallel (#2484)

* Run demo GitHub Action in parallel

* Fix path of action yml

* Move checkout to demo action

* Prettier format

* Specifying shell

* Try to fix uses

* Fix spelling issue

* Fix demo

* Downloading artifacts too unreliable

Building instead

* Re-name step

Re-use action elsewhere

.github/workflows/default.yml

@@ -14,10 +14,7 @@ jobs:
         steps:
             - name: Checkout Repo
               uses: actions/checkout@master
-            - name: Install Dependencies
-              run: npm ci --force
-            - name: Build
-              run: npm run build
+            - uses: "./.github/actions/install-and-build"
             - name: Archive Production Artifact
               uses: actions/upload-artifact@master
               with: