build the hugo site using github actions

.github/workflows/main-ci.yml

@@ -60,3 +60,28 @@ jobs:
           sed -i -- 's/=false/=true/g' .env
           sed -i -- 's/CHANGE_SOURCE=true/CHANGE_SOURCE=false/g' .env
           docker-compose build ${{ matrix.service }}
+
+  build-deploy-docs:
+    runs-on: ubuntu-20.04
+    concurrency:
+      group: ${{ github.workflow }}-${{ github.ref }}
+    defaults:
+      run:
+        working-directory: ./DOCUMENTATION
+    steps:
+      - name: Checkout Source Code
+        uses: actions/checkout@v2
+
+      - name: Setup Hugo
+        uses: peaceiris/actions-hugo@v2.1.0
+        with:
+          hugo-version: '0.20.2'
+
+      - name: Build Hugo Site
+        run: hugo --minify
+
+      - name: Deploy Hugo Site to Guthub Pages
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_branch: gh-pages