Add PR action

.github/workflows/pull_request.yml

@@ -0,0 +1,18 @@
+name: Build website
+on: pull_request
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v1
+
+      - name: Install Node v12
+        uses: actions/setup-node@v1
+        with:
+          node-version: 12
+
+      - name: Build website
+        run: |
+          npm install
+          npm run build

.github/workflows/push.yml

@@ -4,7 +4,7 @@ on:
     branches:
       - master
 jobs:
-  build:
+  deploy:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository