feat: deploy docs to github pages when PR merged

.github/workflows/deploy-mkdocs.yml

@@ -1,19 +1,25 @@
 name: Deploy docs to GitHub Pages
 
 on:
-  push:
-    branches:
-      - main
+  pull_request:
+    branches: [main]
+    types: [closed]
 
 jobs:
   deploy:
     name: Deploy docs to GitHub Pages
+    if: ${{ github.event.pull_request.merged }} # true
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-python@v2
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Setup python3 env
+        uses: actions/setup-python@v2
         with:
           python-version: 3.x
-      - run: pip install mkdocs-material  # including mkdocs
-      - run: go test docs/cmd/doc_test.go # update hrp cli docs
-      - run: mkdocs gh-deploy --force
+      - name: Install mkdocs and material design
+        run: pip install mkdocs-material  # including mkdocs
+      - name: Update hrp cli docs
+        run: go test docs/cmd/doc_test.go # update hrp cli docs
+      - name: Deploy docs to github pages
+        run: mkdocs gh-deploy --force