Fix CI unit test step with a dedicated Docker build stage

.gitea/workflows/ci.yml

@@ -38,10 +38,8 @@ jobs:
 
       - name: Run unit tests
         run: |
-          docker run --rm -v "$PWD":/app -w /app python:3.13-alpine sh -c "
-            pip install --no-cache-dir -r requirements-dev.txt &&
-            pytest -v
-          "
+          docker build --target test -t adguard-cidre:test .
+          docker run --rm adguard-cidre:test pytest -v
 
       - name: Check deprecation warnings
         run: |

Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.13-alpine
+FROM python:3.13-alpine AS base
 
 ENV TZ=Europe/Paris
 
@@ -11,4 +11,11 @@ WORKDIR /app
 
 COPY blocklist_scheduler.py .
 
+FROM base AS test
+COPY requirements-dev.txt .
+RUN pip install --no-cache-dir -r requirements-dev.txt
+COPY tests/ tests/
+COPY pytest.ini .
+
+FROM base
 ENTRYPOINT ["python3", "blocklist_scheduler.py"]