allow manual CI image build run

.github/workflows/ci-image.yml

@@ -0,0 +1,27 @@
+name: build-ci-image
+
+on:
+  workflow_dispatch:
+  workflow_call:
+
+jobs:
+  create-ci-image:
+    name: "Create CI Image"
+    runs-on: "ubuntu-latest"
+    steps:
+      - uses: actions/checkout@v3
+      - name: Login to image repository
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - uses: docker/setup-buildx-action@v2
+      - name: Build and push
+        uses: docker/build-push-action@v3
+        with:
+          context: ./docker
+          push: true
+          tags: ghcr.io/${{ github.repository }}/ci:latest
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

.github/workflows/main.yml

@@ -20,26 +20,9 @@ jobs:
               - 'docker/Dockerfile'
   create-ci-image:
     name: "Create CI Image"
-    runs-on: "ubuntu-latest"
     needs: check-for-ci-image-changes
     if: needs.check-for-ci-image-changes.outputs.need-to-build-image == 'true'
-    steps:
-      - uses: actions/checkout@v3
-      - name: Login to image repository
-        uses: docker/login-action@v2
-        with:
-          registry: ghcr.io
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-      - uses: docker/setup-buildx-action@v2
-      - name: Build and push
-        uses: docker/build-push-action@v3
-        with:
-          context: ./docker
-          push: true
-          tags: ghcr.io/${{ github.repository }}/ci:latest
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
+    uses: ./.github/workflows/ci-image.yml
   tag-pre-release:
     name: "Tag Pre-Release"
     runs-on: "ubuntu-latest"