diff --git a/.github/ISSUE_TEMPLATE/bug_report.md b/.github/ISSUE_TEMPLATE/bug_report.md
index 17ec244f..59225718 100644
--- a/.github/ISSUE_TEMPLATE/bug_report.md
+++ b/.github/ISSUE_TEMPLATE/bug_report.md
@@ -21,6 +21,7 @@ A clear and concise description of what the bug is.
 
 **To Reproduce**
 Steps to reproduce the behavior:
+
 1. Go to '...'
 2. Click on '....'
 3. Scroll down to '....'
@@ -33,8 +34,10 @@ A clear and concise description of what you expected to happen.
 If applicable, add screenshots to help explain your problem.
 
 **Desktop (please complete the following information):**
- - OS: [e.g. MacOS, Windows, Linux <distribution>]
- - Version [e.g. 10]
+
+- OS: [e.g. MacOS, Windows, Linux \<distribution\>]
+- Version [e.g. 10]
 
 **Additional context**
-Add any other context about the problem here. Consider environment variables, IDE (+ version), framework version, runtime version, command and parameters of execution.
+Add any other context about the problem here. Consider environment variables,
+IDE (+ version), framework version, runtime version, command and parameters of execution.
diff --git a/.github/workflows/docker-image.yml b/.github/workflows/docker-image.yml
index 967205fa..ae9dde19 100644
--- a/.github/workflows/docker-image.yml
+++ b/.github/workflows/docker-image.yml
@@ -8,28 +8,127 @@ on: # yamllint disable-line rule:truthy
   pull_request:
     branches: ["main"]
 
+env:
+  IMAGE_NAME: algorithm-exercises-ts
+  ARTIFACT_NAME: algorithm-exercises-ts_${{ github.sha }}
+
 jobs:
 
   build:
-    name: "Build & Test in Docker"
+    name: "Build Docker images"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: "LINT: Build and push"
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          target: lint
+          outputs: |
+            type=docker,dest=/tmp/${{ env.ARTIFACT_NAME }}_lint.tar
+          tags: |
+            ${{ env.IMAGE_NAME }}:lint
+      - name: "LINT: Upload artifact"
+        uses: actions/upload-artifact@v4
+        with:
+          name: ${{ env.ARTIFACT_NAME }}_lint
+          path: /tmp/${{ env.ARTIFACT_NAME }}_lint.tar
+
+      - name: "TEST: Build and push"
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          target: testing
+          outputs: |
+            type=docker,dest=/tmp/${{ env.ARTIFACT_NAME }}_test.tar
+          tags: |
+            ${{ env.IMAGE_NAME }}:test
+      - name: "TEST: Upload artifact"
+        uses: actions/upload-artifact@v4
+        with:
+          name: ${{ env.ARTIFACT_NAME }}_test
+          path: /tmp/${{ env.ARTIFACT_NAME }}_test.tar
+
+      - name: "PRODUCTION: Build and push"
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          target: production
+          outputs: |
+            type=docker,dest=/tmp/${{ env.ARTIFACT_NAME }}_prod.tar
+          tags: |
+            ${{ env.IMAGE_NAME }}:latest
+            ${{ env.IMAGE_NAME }}:${{ github.sha }}
+      - name: "PRODUCTION: Upload artifact"
+        uses: actions/upload-artifact@v4
+        with:
+          name: ${{ env.ARTIFACT_NAME }}_prod
+          path: /tmp/${{ env.ARTIFACT_NAME }}_prod.tar
+
+  lint:
+    name: "Run in docker: LINT"
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Download artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: ${{ env.ARTIFACT_NAME }}_lint
+          path: /tmp/
 
+      - name: Load image
+        run: |
+          docker load --input /tmp/${{ env.ARTIFACT_NAME }}_lint.tar
+          docker image ls -a
+
+      - name: Run lint
+        run: |
+          docker run --rm ${{ env.IMAGE_NAME }}:lint make lint
+
+  test:
+    name: "Run in docker: TEST"
     runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Download artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: ${{ env.ARTIFACT_NAME }}_test
+          path: /tmp/
+
+      - name: Load image
+        run: |
+          docker load --input /tmp/${{ env.ARTIFACT_NAME }}_test.tar
+          docker image ls -a
 
+      - name: Run test
+        run: |
+          docker run --rm ${{ env.IMAGE_NAME }}:test make test
+
+  security:
+    name: "Snyk Container"
+    runs-on: ubuntu-latest
+    needs: build
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
     steps:
       - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
-      - name: Build the Docker image
-        run: make compose/rebuild
-      - name: Lint in Docker image
-        run: make compose/lint
-      - name: Test in Docker image
-        run: make compose/test
-      - name: Run in Docker image
-        run: make compose/run
-      - name: Tag Docker image
-        run: >
-          docker tag
-          algorithm-exercises-ts:latest
-          algorithm-exercises-ts:${{ github.sha }}
+      - name: Download artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: ${{ env.ARTIFACT_NAME }}_prod
+          path: /tmp/
+
+      - name: Load image
+        run: |
+          docker load --input /tmp/${{ env.ARTIFACT_NAME }}_prod.tar
+          docker image ls -a
 
       - name: Run Snyk to check Docker image for vulnerabilities
         # Snyk can be used to break the build when it detects vulnerabilities.
@@ -44,11 +143,47 @@ jobs:
           # yamllint enable rule:line-length
           SNYK_TOKEN: ${{ secrets.SNYK_TOKEN }}
         with:
-          image: algorithm-exercises-ts:latest
+          image: ${{ env.IMAGE_NAME }}:${{ github.sha }}
           args: --file=Dockerfile
-        # yamllint disable rule:comments-indentation
-        # - name: Upload result to GitHub Code Scanning
-        #   uses: github/codeql-action/upload-sarif@v2
-        #   with:
-        #     sarif_file: snyk.sarif
-        # yamllint enable rule:comments-indentation
+      # yamllint disable rule:line-length
+      # https://github.com/github/codeql-action/issues/2187#issuecomment-2043220400
+      - name: Replace security-severity undefined for license-related findings
+        run: |
+          sed -i 's/"security-severity": "undefined"/"security-severity": "0"/g' snyk.sarif
+          sed -i 's/"security-severity": "null"/"security-severity": "0"/g' snyk.sarif
+      # yamllint enable rule:line-length
+      - name: Upload result to GitHub Code Scanning
+        uses: github/codeql-action/upload-sarif@v3
+        with:
+          sarif_file: 'snyk.sarif'
+  scan:
+    name: "Trivy"
+    runs-on: ubuntu-latest
+    needs: build
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+    steps:
+      - name: Download artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: ${{ env.ARTIFACT_NAME }}_prod
+          path: /tmp/
+
+      - name: Load image
+        run: |
+          docker load --input /tmp/${{ env.ARTIFACT_NAME }}_prod.tar
+          docker image ls -a
+
+      - name: Run Trivy vulnerability scanner
+        uses: aquasecurity/trivy-action@0.24.0
+        with:
+          image-ref: ${{ env.IMAGE_NAME }}:${{ github.sha }}
+          format: 'sarif'
+          output: 'trivy-results.sarif'
+
+      - name: Upload Trivy scan results to GitHub Security tab
+        uses: github/codeql-action/upload-sarif@v3
+        with:
+          sarif_file: 'trivy-results.sarif'
diff --git a/.github/workflows/snyk-code.yml b/.github/workflows/snyk-code.yml
index df32d4f7..6c607e75 100644
--- a/.github/workflows/snyk-code.yml
+++ b/.github/workflows/snyk-code.yml
@@ -10,7 +10,12 @@ on: # yamllint disable-line rule:truthy
 
 jobs:
   security:
+    name: Snyk Open Source (Node.js)
     runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
     steps:
       - uses: actions/checkout@master
       - name: Run Snyk to check for vulnerabilities
@@ -19,10 +24,8 @@ jobs:
         env:
           SNYK_TOKEN: ${{ secrets.SNYK_TOKEN }}
         with:
-          args: --sarif-file-output=snyk.sarif
-      # yamllint disable rule:comments-indentation
-      # - name: Upload result to GitHub Code Scanning
-      #   uses: github/codeql-action/upload-sarif@v2
-      #   with:
-      #     sarif_file: snyk.sarif
-      # yamllint enable rule:comments-indentation
+          args: --sarif-file-output=snyk-code.sarif
+      - name: Upload result to GitHub Code Scanning
+        uses: github/codeql-action/upload-sarif@v3
+        with:
+          sarif_file: 'snyk-code.sarif'
diff --git a/Dockerfile b/Dockerfile
index 9a984de5..a026e695 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -34,6 +34,7 @@ COPY ./CODE_OF_CONDUCT.md ${WORKDIR}/
 COPY ./src ${WORKDIR}/src
 COPY ./package.json ${WORKDIR}/package.json
 COPY ./package-lock.json ${WORKDIR}/package-lock.json
+COPY ./tsconfig.json ${WORKDIR}/
 COPY ./Makefile ${WORKDIR}/
 
 # code linting conf
@@ -48,6 +49,10 @@ COPY ./.markdownlint.yaml ${WORKDIR}/
 # yamllint conf
 COPY ./.yamllint ${WORKDIR}/
 COPY ./.yamlignore ${WORKDIR}/
+COPY ./.gitignore ${WORKDIR}/
+
+# Dependencies
+RUN npm ci --verbose --ignore-scripts
 
 CMD ["make", "lint"]
 
@@ -57,6 +62,7 @@ FROM base AS development
 ENV WORKDIR=/app
 WORKDIR ${WORKDIR}
 
+# Code source
 COPY ./src ${WORKDIR}/src
 COPY ./package.json ${WORKDIR}/package.json
 COPY ./package-lock.json ${WORKDIR}/package-lock.json
@@ -64,7 +70,9 @@ COPY ./Makefile ${WORKDIR}/
 COPY ./tsconfig.json ${WORKDIR}/tsconfig.json
 COPY ./tsconfig.prod.json ${WORKDIR}/tsconfig.prod.json
 
-RUN npm ci --verbose --ignore-scripts
+# Dependencies
+COPY --from=lint /app/node_modules ${WORKDIR}/node_modules
+
 RUN ls -alh
 
 # CMD []