feat(ci): implemented linters and docker build and resolved linter errors

.github/workflows/docker-publish.yaml

@@ -0,0 +1,83 @@
+name: Docker
+
+on:
+  push:
+    branches: [ main, github-actions ]
+    tags: [ 'v*.*.*' ]
+  pull_request:
+    branches: [ main ]
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+      id-token: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+
+      # https://github.com/sigstore/cosign-installer
+      - name: Install cosign
+        if: github.event_name != 'pull_request'
+        uses: sigstore/cosign-installer@faadad0cce49287aee09b3a48701e75088a2c6ad #v4.0.0
+
+      # https://github.com/docker/setup-buildx-action
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 # v3.11.1
+
+      # https://github.com/docker/login-action
+      - name: Log into registry ${{ env.REGISTRY }}
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@5e57cd118135c172c3672efd75eb46360885c0ef # v3.6.0
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      # https://github.com/docker/metadata-action
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@c299e40c65443455700f0fdfc63efafe5b349051 # v5.10.0
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=ref,event=branch
+            type=ref,event=pr
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+
+      # https://github.com/docker/build-push-action
+      - name: Build and push Docker image
+        id: build-and-push
+        uses: docker/build-push-action@263435318d21b8e681c14492fe198d362a7d2c83 # v6.18.0
+        with:
+          context: .
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+
+      - name: Sign the published Docker image
+        if: ${{ github.event_name != 'pull_request' }}
+        env:
+          TAGS: ${{ steps.meta.outputs.tags }}
+          DIGEST: ${{ steps.build-and-push.outputs.digest }}
+        run: echo "${TAGS}" | xargs -I {} cosign sign --yes {}@${DIGEST}
+
+      - name: Checkov Dockerfile
+        uses: bridgecrewio/checkov-action@99bb2caf247dfd9f03cf984373bc6043d4e32ebf # v12.1347.0
+        with:
+          quiet: true
+          docker_image: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          dockerfile_path: ./Dockerfile
+          container_user: 10001

.github/workflows/python-app.yaml

@@ -0,0 +1,31 @@
+name: Python application
+
+on:
+  push:
+    branches: [ main, github-actions ]
+  pull_request:
+    branches: [ main ]
+
+permissions:
+  contents: read
+
+jobs:
+  lint-and-test:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+    - name: Set up Python 3.12.12
+      uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
+      with:
+        python-version: "3.12.12"
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        if [ -f requirements-dev.txt ]; then pip install -r requirements-dev.txt; fi
+    - name: Lint with pylint
+      run: |
+        pylint src/ tests/ --fail-under=9.0
+    - name: Test with pytest
+      run: |
+        pytest

Dockerfile

@@ -1,11 +1,11 @@
-FROM python:3.9.25-alpine3.22
+FROM python:3.12.12-alpine3.23@sha256:f47255bb0de452ac59afc49eaabe992720fe282126bb6a4f62de9dd3db1742dc
 
 ENV PYTHONUNBUFFERED=1
 ENV PYTHONDONTWRITEBYTECODE=1
 
 WORKDIR /app
 
-RUN apk add --no-cache curl=8.14.1-r2 jq=1.8.1-r0
+RUN apk add --no-cache jq=1.8.1-r0
 
 COPY requirements.txt requirements.txt
 
@@ -16,4 +16,9 @@ USER tokentx
 
 COPY src/ /app/src/
 
+EXPOSE 8080
+
+HEALTHCHECK --interval=30s --timeout=30s --start-period=5s --retries=3 \
+  CMD curl -f http://localhost:8080/health/ready || exit 1
+
 ENTRYPOINT ["python", "src/main.py"]

requirements-dev.txt

@@ -0,0 +1,4 @@
+-r requirements.txt
+pytest==9.0.1
+pytest-asyncio==1.3.0
+pylint==4.0.4