first go at creating the build action

.github/workflows/docker.yml

@@ -0,0 +1,24 @@
+name: Build and Publish Docker Images
+on:
+  push:
+
+jobs:
+  buildmatrix:
+    name: Create Build Matrix
+    runs-on: ubuntu-latest
+    outputs:
+      matrix: ${{ steps.set-matrix.outputs.matrix }}
+    steps:
+      - name: Set up matrix
+        id: set-matrix
+        run: |
+          echo "matrix=$(curl https://download.dokuwiki.org/version | jq '{release: [.[]]}'" >> $GITHUB_OUTPUT 
+
+  build:
+    needs: buildmatrix
+    name: Build Docker Images
+    runs-on: ubuntu-latest
+    strategy:
+      matrix: ${{fromJson(needs.buildmatrix.outputs.matrix)}}
+    steps:
+      - run: echo ${{ matrix.release }}