Housekeeping workflow rework (#771)

* remove the chart version from readme template

* only (re)generate docs once a day or on demand, not on every change

* simplify workflow a bit

* streamline docs generation some more

* integrate helm-docs generation into to workflow

* Turn it into a single daily housekeeping job

* always include index.yaml when deploying docs...

.github/workflows/docs.deploy.yaml

@@ -7,6 +7,7 @@ on:
     paths:
       - 'docs/**'
       - '.github/workflows/docs.deploy.yaml'
+      - 'index.yaml'
       - 'mkdocs.yml'
 
 jobs:
@@ -19,6 +20,10 @@ jobs:
         with:
           token: ${{ secrets.BOT_TOKEN }}
 
+      - name: Copy index.yaml to website
+        run: |
+          yes | cp -rf index.yaml docs/index.yaml || echo "chart-index copy failed, continuing..."
+
       - name: Deploy docs
         uses: mhausenblas/mkdocs-deploy-gh-pages@master
         env: