Change action format

action.yaml

@@ -8,20 +8,8 @@ inputs:
     description: "File to write output to"
     required: true
 runs:
-  using: "composite"
-  steps:
-    - name: Checkout action code
-      uses: actions/checkout@v4
-      with:
-        ref: main
-        repository: ${{ github.action_repository }}
-        path: ./gha-summarizer
-
-    - name: Setup Go environment
-      uses: actions/setup-go@v5
-      with:
-        go-version-file: ./gha-summarizer/go.mod
-
-    - name: Run templating
-      run: go run ./gha-summarizer/main.go ${{ inputs.template }} ${{ inputs.output }}
-      shell: bash
+  using: docker
+  image: Dockerfile
+  args:
+    - ${{ inputs.template }}
+    - ${{ inputs.out-file }}