ci: added pull request checks

fix #33

.github/workflows/pull-request.yml

@@ -0,0 +1,26 @@
+name: "Build and checks"
+on:
+  push:
+    branches:
+      - master
+      - dev
+jobs:
+  deploy-blog:
+    name: Deploying the static pages to the FTP server
+    runs-on: ubuntu-20.04
+    container: klakegg/hugo:ext-alpine
+    defaults:
+      run:
+        working-directory: CodeIT
+    steps:
+      - name: Set up Git repository
+        uses: actions/checkout@v2
+        with:
+          path: 'CodeIT'
+          fetch-depth: 0
+      - name: Install HTML proofer
+        run: apk update && apk install -y ruby-full && gem install html-proofer --no-document
+      - name: Build static pages
+        run: hugo --source=exampleSite -v --gc
+      - name: Check the theme documentation
+        run: htmlproofer exampleSite/public --check-html --allow-hash-href --empty-alt-ignore --disable-external