diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c7c6ac1..4cf938e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,6 +6,10 @@ on:
   pull_request:
     branches: [main, master, develop]
 
+env:
+  REGISTRY: ghcr.io
+  IMAGE_TAG: ${{ github.sha }}
+
 jobs:
   frontend-check:
     name: Frontend CI
@@ -24,9 +28,14 @@ jobs:
       - name: Install dependencies
         run: npm ci
       - name: Lint
-        run: npm run lint || echo "Lint warning"
+        run: npm run lint
       - name: TypeCheck
-        run: npx tsc --noEmit || true
+        run: npx tsc --noEmit
+      - name: Run unit tests
+        run: npm test
+      - name: Security audit
+        run: npm audit --audit-level=high
+        continue-on-error: true
       - name: Build
         run: npm run build
         env:
@@ -49,6 +58,10 @@ jobs:
       - name: Install dependencies
         run: npm ci
         working-directory: services/${{ matrix.service }}
+      - name: Security audit
+        run: npm audit --audit-level=high
+        continue-on-error: true
+        working-directory: services/${{ matrix.service }}
       - name: Syntax check
         run: node -c index.js
         working-directory: services/${{ matrix.service }}
@@ -77,6 +90,11 @@ jobs:
       - name: Compile check
         run: go build -v ./...
         working-directory: services/${{ matrix.service }}
+      - name: Security scan
+        run: |
+          go install github.com/securego/gosec/v2/cmd/gosec@latest
+          gosec -no-fail -fmt sarif -out gosec-results.sarif ./...
+        working-directory: services/${{ matrix.service }}
 
   python-services-check:
     name: Python Services CI
@@ -98,11 +116,15 @@ jobs:
           pip install -r requirements.txt
         working-directory: services/${{ matrix.service }}
       - name: Install linting tools
-        run: pip install flake8 pytest httpx
+        run: pip install flake8 pytest httpx bandit
         working-directory: services/${{ matrix.service }}
       - name: Lint Python
         run: flake8 . --max-line-length=120
         working-directory: services/${{ matrix.service }}
+      - name: Security scan
+        run: bandit -r . --severity high
+        working-directory: services/${{ matrix.service }}
+        continue-on-error: true
       - name: Test Python
         run: pytest -v
         working-directory: services/${{ matrix.service }}
@@ -124,3 +146,73 @@ jobs:
       - name: Compile and test
         run: mvn clean test
         working-directory: services/${{ matrix.service }}
+
+  docker-build:
+    name: Docker Build
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        image:
+          - frontend
+          - api-gateway-node
+          - auth-service
+          - notification-go-service
+          - attendance-service
+          - employee-python-service
+          - analytics-python-service
+          - payroll-java-service
+          - leave-service
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Log in to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+        if: github.event_name == 'push'
+      - name: Determine Docker context
+        id: context
+        shell: bash
+        run: |
+          if [[ "${{ matrix.image }}" == "frontend" ]]; then
+            echo "context=frontend" >> $GITHUB_OUTPUT
+            echo "dockerfile=frontend/Dockerfile" >> $GITHUB_OUTPUT
+          else
+            echo "context=services/${{ matrix.image }}" >> $GITHUB_OUTPUT
+            echo "dockerfile=services/${{ matrix.image }}/Dockerfile" >> $GITHUB_OUTPUT
+          fi
+      - name: Build and push
+        uses: docker/build-push-action@v5
+        with:
+          context: ${{ steps.context.outputs.context }}
+          dockerfile: ${{ steps.context.outputs.dockerfile }}
+          push: ${{ github.event_name == 'push' }}
+          tags: |
+            ${{ env.REGISTRY }}/${{ github.repository }}/${{ matrix.image }}:${{ env.IMAGE_TAG }}
+            ${{ env.REGISTRY }}/${{ github.repository }}/${{ matrix.image }}:latest
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+
+  security-scan:
+    name: Security Scan
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Run Trivy vulnerability scanner
+        uses: aquasecurity/trivy-action@master
+        with:
+          scan-type: fs
+          scan-ref: .
+          format: sarif
+          output: trivy-results.sarif
+          severity: HIGH,CRITICAL
+          exit-code: 1
+        continue-on-error: true
+      - name: Upload Trivy results to GitHub Security
+        uses: github/codeql-action/upload-sarif@v3
+        with:
+          sarif_file: trivy-results.sarif
+        if: always()