fix: Replace Docker build test with lightweight syntax validation

.github/workflows/docker-validate.yml

@@ -0,0 +1,54 @@
+name: Docker Validation
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+    paths:
+      - 'Dockerfile*'
+      - 'docker-compose*.yml'
+      - 'docker-compose*.yaml'
+      - '.github/workflows/docker-validate.yml'
+  pull_request:
+    paths:
+      - 'Dockerfile*'
+      - 'docker-compose*.yml'
+      - 'docker-compose*.yaml'
+      - '.github/workflows/docker-validate.yml'
+
+jobs:
+  validate-dockerfiles:
+    name: Validate Docker Configuration
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Validate docker-compose.yaml syntax
+        run: |
+          docker compose config
+          echo "✓ docker-compose.yaml syntax validation passed"
+
+      - name: Lint Dockerfile
+        uses: hadolint/[email protected]
+        with:
+          dockerfile: Dockerfile
+          failure-threshold: warning
+
+      - name: Lint Dockerfile.dev
+        uses: hadolint/[email protected]
+        with:
+          dockerfile: Dockerfile.dev
+          failure-threshold: warning
+
+      - name: Summary
+        run: |
+          echo "✅ Docker configuration validation complete"
+          echo ""
+          echo "Note: Full image builds are not performed in this workflow to save CI resources."
+          echo "Production builds are tested during Cloudflare Pages deployments."

Dockerfile

@@ -27,7 +27,7 @@ RUN apt-get update && \
 WORKDIR /app
 
 # Copy package files for dependency installation
-COPY package.json pnpm-lock.yaml pnpm-workspace.yaml ./
+COPY package.json pnpm-lock.yaml ./
 
 # Install dependencies
 RUN pnpm install --frozen-lockfile

Dockerfile.dev

@@ -23,7 +23,7 @@ RUN apt-get update && \
 WORKDIR /app
 
 # Copy package files for dependency installation
-COPY package.json pnpm-lock.yaml pnpm-workspace.yaml ./
+COPY package.json pnpm-lock.yaml ./
 
 # Install all dependencies (including devDependencies)
 RUN pnpm install --frozen-lockfile