refactor image import and add Alpine docker image

- dynamic import of QR reader
- build docker also for arm64

Dockerfile

@@ -1,11 +1,17 @@
-FROM python:3.11-alpine
+FROM python:3.11-slim-bullseye
 
 WORKDIR /extract
 
 COPY . .
 
-RUN pip install -r requirements.txt
+ARG run_tests=true
+
+RUN apt-get update && apt-get install -y libzbar0 python3-opencv nano \
+    && pip install -r requirements.txt \
+    && if [[ "$run_tests" == "true" ]] ; then /extract/run_pytest.sh ; else echo "Not running tests..." ; fi
 
 WORKDIR /files
 
-ENTRYPOINT [ "python", "/extract/extract_otp_secret_keys.py" ]
+ENTRYPOINT ["python", "/extract/extract_otp_secret_keys.py"]
+
+LABEL org.opencontainers.image.source https://github.com/scito/extract_otp_secret_keys