chore: Dev Containersにキャッシュがかかるように変更 (#51)

Co-authored-by: rai <[email protected]>

.devcontainer/devcontainer.json

@@ -2,6 +2,7 @@
     "name": "program-grading-system",
     "build": {
       "dockerfile": "../Dockerfile",
+      "cacheFrom": "ghcr.io/tus-project-team/program-grading-system-devcontainer:main",
       "args": { 
         "UID": "1000",
         "GID": "1000"

.github/workflows/devcontainer-ci.yml

@@ -0,0 +1,52 @@
+name: Devcontainer CI
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+jobs:
+  changes:
+    name: Changes
+    runs-on: ubuntu-24.04
+    permissions:
+      contents: read
+      packages: write
+    outputs:
+      dockerfile: ${{ steps.changes.outputs.dockerfile }}
+      tool-versions: ${{ steps.changes.outputs.tool-versions }}
+      workflows: ${{ steps.changes.outputs.workflows }}
+    steps:
+      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
+      - name: Check Dockerfile files changed
+        uses: dorny/paths-filter@de90cc6fb38fc0963ad72b210f1f284cd68cea36 # v3.0.2
+        id: changes
+        with:
+          filters: |
+            dockerfile:
+              - 'Dockerfile'
+            tool-versions:
+              - '.tool-versions'
+            workflows:
+              - '.github/workflows/devcontainer-ci.yml'
+
+  build:
+    name: Build and push Docker image
+    runs-on: ubuntu-24.04
+    permissions:
+      contents: read
+      packages: write
+    needs: changes
+    if: needs.changes.outputs.dockerfile == 'true' || needs.changes.outputs.tool-versions == 'true' || needs.changes.outputs.workflows == 'true'
+    steps:
+      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@9780b0c442fbb1117ed29e0efdff1e18412f7567
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Build and run dev container task
+        uses: devcontainers/ci@a56d055efecd725e8cfe370543b6071b79989cc8
+        with:
+          imageName: ghcr.io/${{ github.repository }}-devcontainer:${{ github.ref_name }}