Rework tooling to use Docker and Structurizr

.forgejo/workflows/confluence.yaml

@@ -0,0 +1,37 @@
+name: Export to Confluence
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  confluence:
+    runs-on: lxc
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Docker
+        run: |
+          curl -fsSL https://get.docker.com -o get-docker.sh
+          sudo sh get-docker.sh
+
+      - name: Set up JDK
+        uses: https://github.com/actions/setup-java@v4
+        with:
+          distribution: "temurin"
+          java-version: "17"
+
+      - name: Log in to Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: stackit-solutions.git.onstackit.cloud
+          username: ${{ vars.REGISTRY_USERNAME }}
+          password: ${{ secrets.REGISTRY_PASSWORD }}
+
+      - name: Deploy to Confluence
+        run: ./dtcw publishToConfluence -PconfluenceUser="$ARC42_EXPORT_CONFLUENCE_USER_EMAIL" -PconfluencePass="$ARC42_EXPORT_CONFLUENCE_USER_PAT"
+        env:
+          ARC42_EXPORT_CONFLUENCE_USER_EMAIL: ${{ secrets.ARC42_EXPORT_CONFLUENCE_USER_EMAIL }}
+          ARC42_EXPORT_CONFLUENCE_USER_PAT: ${{ secrets.ARC42_EXPORT_CONFLUENCE_USER_PAT }}