ci: add gh action to copy docs/ directory to repo wiki

.github/workflows/docs-to-wiki.yml

@@ -0,0 +1,55 @@
+name: Copy `docs/` to repo wiki
+on:
+  push:
+    branches:
+      - main
+      - DEVREL-34-document-basic-usage
+  workflow_dispatch:
+
+jobs:
+  copy-docs:
+    name: Copy contents of `docs/` to wiki repo
+    runs-on: ubuntu-latest
+    steps:
+
+      # Checkout the present repo under the `repo/` dir
+      - name: Checkout base repo
+        uses: actions/checkout@v2
+        with:
+          path: repo
+
+      - name: Checkout wiki repo
+        uses: actions/checkout@v2
+        with:
+          repository: "${{ github.repository }}.wiki"
+          path: wiki
+
+      # Checkout the wiki repo under the `wiki/` dir
+      # - name: Checkout wiki repo
+      #   run: |
+      #     git config --global user.name "GitHub Actions"
+      #     git config --global user.email "[email protected]"
+
+      #     git clone https://github.com/workflows-sh/aws-eks-ec2-asg-cdk.wiki.git wiki
+
+      # Copy the contents of `docs/` to `wiki/`
+      # This will overwrite any existing files in the wiki repo, because
+      # the contents of the `wiki/` dir are deleted before the copy, ensuring
+      # that the wiki repo is always in sync with the base repo.
+      - name: Copy docs/ to wiki/
+        run: |
+          rm -rf wiki/*
+
+          cp -r repo/docs/* wiki/
+          mv wiki/README.md wiki/Home.md
+
+      - name: Commit and push changes to wiki
+        run: |
+          cd wiki
+
+          git config --global user.name "GitHub Actions"
+          git config --global user.email "[email protected]"
+
+          git add .
+          git commit -m "Update wiki with latest docs"
+          git push