feat: pre-build Docker image and push to Docker Hub for faster setup

- Add GitHub Actions workflow to build/push image on Dockerfile changes
- Update compose.yaml to pull pre-built bakerlinklab/bakerlink-env:latest
- Add .github/ to cargo-generate ignore list to protect ${{ }} syntax

Agent-Logs-Url: https://github.com/Baker-link-Lab/bakerlink_tutorial_template/sessions/a073b2f3-6935-476b-be2a-58f9cef53054

Co-authored-by: Baker-Tanaka <42606588+Baker-Tanaka@users.noreply.github.com>

Author: Copilot

.docker/compose.yaml

@@ -1,9 +1,6 @@
 services:
   {{project-name}}:
-    build:
-      context: .
-      dockerfile: Dockerfile
-    image: "baker-link-env"
+    image: "bakerlinklab/bakerlink-env:latest"
     container_name: "{{project-name}}-container"
     volumes:
       - "../:/{{project-name}}"

.github/workflows/docker-publish.yml

@@ -0,0 +1,41 @@
+name: Build and Push Docker Image
+
+on:
+  push:
+    branches: [main]
+    paths:
+      - '.docker/Dockerfile'
+  workflow_dispatch:
+
+env:
+  DOCKER_IMAGE: bakerlinklab/bakerlink-env
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to Docker Hub
+        # Requires repository secrets: DOCKERHUB_USERNAME and DOCKERHUB_TOKEN
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          context: .docker
+          file: .docker/Dockerfile
+          push: true
+          tags: |
+            ${{ env.DOCKER_IMAGE }}:latest
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

cargo-generate.toml

@@ -1,2 +1,2 @@
 [template]
-ignore = ["README.md", "LICENSE"]
+ignore = ["README.md", "LICENSE", ".github/"]