Add meta workflow for config

.github/workflows/meta.yaml

@@ -0,0 +1,46 @@
+name: Meta
+
+on:
+  workflow_call:
+    inputs:
+      images:
+        type: string
+        required: true
+      pandoc_version:
+        type: string
+        default: main
+      build_stack:
+        type: string
+        default: alpine
+
+jobs:
+  conf:
+    name: Configure
+    runs-on: ubuntu-latest
+    outputs:
+      base_image: ${{ steps.config.outputs.base_image }}
+      base_image_version: ${{ steps.config.outputs.base_image_version }}
+      build_stack: ${{ steps.config.outputs.build_stack }}
+      labels: ${{ steps.meta.outputs.labels }}
+      tags: ${{ steps.config.outputs.tags }}
+      texlive_version: ${{ steps.config.outputs.texlive_version }}
+
+    steps:
+      - name: Config
+        id: config
+        run: |
+          ./scripts/config.sh \
+              ${{ inputs.pandoc_version }} \
+              ${{ inputs.build_stack }} \
+              ${{ inputs.images }}
+          ./scripts/config.sh \
+              ${{ inputs.pandoc_version }} \
+              ${{ inputs.build_stack }} \
+              ${{ inputs.images }} \
+              >> $GITHUB_OUTPUT
+
+      - name: Docker Meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ inputs.images }}