📝(self-hosted) add documentation

Add a documentation to deploy a self-hosted visio instance in a
standalone way (witout AI features)

.github/workflows/release-helm-chart.yaml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
@@ -31,5 +31,7 @@ jobs:
         uses: helm/chart-releaser-action@v1.6.0
         with:
           charts_dir: ./src/helm
+          skip_existing: True
+          mark_as_latest: False
         env:
           CR_TOKEN: "${{ secrets.GITHUB_TOKEN }}"