Fix module support

Dockerfile

@@ -7,6 +7,6 @@ COPY poetry.lock pyproject.toml ./
 RUN apk add --no-cache gcc musl-dev python3-dev libffi-dev openssl-dev cargo && pip install --no-cache-dir poetry && poetry config virtualenvs.create false && poetry install --no-root --no-interaction --no-ansi -vvv && apk del gcc musl-dev python3-dev libffi-dev openssl-dev cargo
 COPY . .
 
-WORKDIR /usr/src/app/robocop_ng
+WORKDIR /usr/src/app
 
-CMD [ "python", "./__init__.py" ]
+CMD [ "python", "-m", "robocop_ng" ]