added shit

docker-builds/goodwe-prometheus-exporter/Dockerfile

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+FROM python:3.8-alpine
+ENV PYTHONUNBUFFERED=1
+WORKDIR /app
+COPY /src/exporter.py .
+RUN python -m pip install --upgrade pip
+RUN pip install --root-user-action=ignore --upgrade goodwe asyncio aiohttp prometheus_client 
+ENTRYPOINT ["python", "exporter.py"]