chore(ci): add release and build workflows

.github/workflows/release.yaml

@@ -0,0 +1,57 @@
+name: Build and Publish Slack Bot
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
+
+    - name: Log in to Container Registry
+      uses: docker/login-action@v3
+      with:
+        registry: ${{ env.REGISTRY }}
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Tag Image
+      id: meta
+      uses: docker/metadata-action@v5
+      with:
+        images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+        tags: |
+          type=raw,value=latest
+
+    - name: Build and push Docker image
+      id: build
+      uses: docker/build-push-action@v5
+      with:
+        context: .
+        push: true
+        tags: ${{ steps.meta.outputs.tags }}
+        labels: ${{ steps.meta.outputs.labels }}
+        cache-from: type=gha
+        cache-to: type=gha,mode=max
+
+    - name: Output image details
+      run: |
+        echo "✅ Docker image built and pushed successfully!"
+        echo "📦 Image: ${{ steps.meta.outputs.tags }}"
+        echo "🔍 Digest: ${{ steps.build.outputs.digest }}"

Dockerfile

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+FROM node:18-alpine AS builder
+
+WORKDIR /app
+
+COPY package*.json ./
+COPY tsconfig.json ./
+
+RUN npm ci --silent
+
+COPY . .
+
+RUN npm run build
+
+FROM node:18-alpine AS production
+
+WORKDIR /app
+
+RUN addgroup -g 1001 -S nodejs && \
+    adduser -S slackbot -u 1001
+
+COPY package*.json ./
+
+RUN npm ci --only=production --silent && npm cache clean --force
+
+COPY --from=builder /app/dist ./dist
+
+COPY --from=builder /app/manifest.json ./manifest.json 2>/dev/null || true
+
+RUN chown -R slackbot:nodejs /app
+USER slackbot
+
+HEALTHCHECK --interval=30s --timeout=3s --start-period=10s --retries=3 \
+    CMD pgrep -f "node.*dist" > /dev/null || exit 1
+
+ENV NODE_ENV=production
+
+CMD ["node", "dist/app.js"]