Prepare for renovate bot

.github/workflows/gh-pages.yml

@@ -16,7 +16,7 @@ jobs:
         run: |
           sudo apt-get -y update
           sudo apt-get -y install python3-pip
-          pip install mkdocs-material==7.3.6 pygments==2.10.0 mkdocs-redirects==1.0.3
+          pip install -r requirements.txt
 
       - name: Build site 🔧
         run: |

.github/workflows/renovate_check-build.yml

@@ -0,0 +1,23 @@
+name: Check build for renovate
+on:
+   push:
+     branches:
+       - 'renovate/**'
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout 📥
+        uses: actions/checkout@v2.4.0
+        with:
+          token: '${{ secrets.GHPAGES_ACTION_CHECKOUT_TOKEN_PAT }}'
+
+      - name: Install dependencies 🐄
+        run: |
+          sudo apt-get -y update
+          sudo apt-get -y install python3-pip
+          pip install -r requirements.txt
+
+      - name: Build site 🔧
+        run: |
+          mkdocs build --verbose --clean

README.md

@@ -1,4 +1,4 @@
-[![Build and deploy to gh-pages](https://github.com/mailcow/mailcow-dockerized-docs/actions/workflows/gh-pages.yml/badge.svg)](https://github.com/mailcow/mailcow-dockerized-docs/actions/workflows/gh-pages.yml)
+[![Build and deploy to gh-pages](https://img.shields.io/github/workflow/status/mailcow/mailcow-dockerized-docs/Build%20and%20deploy%20to%20gh-pages/master?label=Build%20and%20deploy%20to%20gh-pages)](https://github.com/mailcow/mailcow-dockerized-docs/actions/workflows/gh-pages.yml)
 
 # mailcow: dockerized documentation
 
@@ -9,6 +9,7 @@ https://mailcow.github.io/mailcow-dockerized-docs
 To build it locally, you need the [Material theme for MkDocs](https://squidfunk.github.io/mkdocs-material/), [MkDocs](https://www.mkdocs.org/) itself and [Pygments](http://pygments.org/). To install these with [pip](https://pip.pypa.io/en/stable/) and get it up and running, fire up your terminal and enter
 
 ```
-pip install mkdocs-material==7.3.6 pygments==2.10.0 mkdocs-redirects==1.0.3
+git clone https://github.com/mailcow/mailcow-dockerized-docs.git
+pip install -r requirements.txt
 mkdocs serve
 ```

requirements.txt

@@ -0,0 +1,3 @@
+mkdocs-material==7.3.6
+mkdocs-redirects==1.0.3
+pygments==2.10.0