Update docs.yml

.github/workflows/docs.yml

@@ -20,10 +20,10 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install -r requirements.txt
-        mkdir log/
+        pip install mkdocs
+        apt install doxygen
     - name: Build doxygen
-      run: echo 'tbd...'
+      run: doxygen docu/doxygen.ini
     - name: Build mkDocs
       run: mkdocs build -f docu/mkdocs.yml
     - name: Deploy docs