Add CF lint, check if docs build on pr (#660)

* Add CF lint, check if docs build and do a spellcheck

* set the right repository for spellchecking

* check only markdown files

* remove pipeline filters

* Remove spellcheck

.github/workflows/check.yml

@@ -0,0 +1,24 @@
+name: Build docs and check cloudformation
+
+on:
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  build:
+    name: build docs
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout repository 
+      uses: actions/checkout@v3.0.0
+    - name: Install dependencies
+      run: |
+        pip install -r requirements.txt
+    - name: Build documentation
+      run: |
+        mkdocs build
+    - name: Setup cloudformation linter 
+      uses: ScottBrenner/cfn-lint-action@v2.2.1
+    - name: Run cloudformation lint 
+      run: cfn-lint -t stack.yml