ci: move docs to separate action

.github/workflows/publish-docs.yml

@@ -0,0 +1,33 @@
+name: Publish Docs
+
+on:
+  workflow_dispatch: { }
+  workflow_run:
+    workflows: [ "Release (Production)" ]
+    branches: [ main ]
+    types:
+      - completed
+
+jobs:
+  publish-docs:
+    name: Publish Docs
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - name: Install mkdocs
+        run: |
+          pip install \
+            mkdocs \
+            mkdocs-material \
+            md-toc
+      - name: Generate docs
+        run: mkdocs gh-deploy --strict
+#      - name: Publish docs
+#        uses: peaceiris/actions-gh-pages@v3
+#        with:
+#          github_token: ${{ secrets.GITHUB_TOKEN }}
+#          publish_dir: ./site
+

.github/workflows/release.yml

@@ -187,29 +187,6 @@ jobs:
             docker manifest push ghcr.io/containrrr/watchtower:$(echo $TAG | sed 's/^v*//') && \
             docker manifest push ghcr.io/containrrr/watchtower:latest
 
-  publish-docs:
-    name: Publish Docs
-    needs: build
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v2
-        with:
-          fetch-depth: 0
-      - name: Install mkdocs
-        run: |
-          pip install \
-            mkdocs \
-            mkdocs-material \
-            md-toc
-      - name: Generate docs
-        run: mkdocs build
-      - name: Publish docs
-        uses: peaceiris/actions-gh-pages@v3
-        with:
-          github_token: ${{ secrets.GITHUB_TOKEN }}
-          publish_dir: ./site
-
   renew-docs:
     name: Refresh pkg.go.dev
     needs: build