feat(CICD): add docker linter

.github/workflows/build.yaml

@@ -13,7 +13,7 @@ permissions: write-all
       - main
 env:
   IMAGE_NAME: 'pygitver'
-  REGISTRY_NAME: pygitver
+  DOCKER_USERNAME: ${{ secrets.DOCKER_USERNAME }}
 
 jobs:
   unittests:
@@ -33,25 +33,33 @@ jobs:
   build:
     runs-on: ubuntu-latest
     needs: unittests
-    if: github.ref == 'refs/heads/main'
     steps:
       - uses: actions/checkout@v3
 
+      - name: Dockerfile lint
+        if: ${{ env.IMAGE_EXIST == 'false' }}
+        id: validate-dockerfile
+        shell: bash
+        run: |
+          docker run --rm -e HADOLINT_IGNORE=DL3007,DL3008,DL3018,DL4006,DL3013 -i hadolint/hadolint < Dockerfile
+
       - name: Docker Build
         shell: bash
         run: |
           set -x
-          docker build -t "panpuchkov/${{ env.IMAGE_NAME }}" .
+          docker build -t "${{ env.DOCKER_USERNAME }}/${{ env.IMAGE_NAME }}" .
 
       - name: Log in to Docker Hub
+        if: github.ref == 'refs/heads/main'
         uses: docker/login-action@v3
         with:
-          username: panpuchkov
+          username: ${{ env.DOCKER_USERNAME }}
           password: ${{ secrets.DOCKER_PASSWORD }}
 
       - name: Docker Push
+        if: github.ref == 'refs/heads/main'
         shell: bash
         run: |
           set -x
-          IMAGE_NAME_WITH_VERSION="panpuchkov/${{ env.IMAGE_NAME }}:latest"
+          IMAGE_NAME_WITH_VERSION="${{ env.DOCKER_USERNAME }}/${{ env.IMAGE_NAME }}:latest"
           docker push "${IMAGE_NAME_WITH_VERSION}"

Dockerfile

@@ -10,8 +10,8 @@ ENV PATH="/opt/venv/bin:$PATH"
 
 # Install pip requirements
 COPY ./requirements.txt /pygitver/requirements.txt
-RUN pip install -U pip  \
-    && pip install -r /pygitver/requirements.txt --no-cache-dir
+RUN pip install --no-cache-dir -U pip  \
+    && pip install --no-cache-dir -r /pygitver/requirements.txt
 
 FROM python:3.12-alpine