Amend Dockerfile permission issue (canada-ca#615)

Author: Ethanljf

services/auto-scan/Dockerfile

@@ -5,9 +5,6 @@ ENV HOME /autoscan
 WORKDIR $HOME
 COPY . ./
 
-RUN useradd -r -u 1001 autoscan
-USER autoscan
-
 RUN apt-get update
 RUN apt-get install -y --no-install-recommends apt-utils && \
 apt-get install -y --no-install-recommends python3 python3-pip && \
@@ -16,4 +13,8 @@ apt-get install -y --no-install-recommends python3-setuptools python3-wheel
 # Install dependencies.
 RUN python3 -m pip install -r requirements.txt
 
+RUN chmod +x autoscan.py
+RUN useradd -r -u 1001 autoscan
+USER autoscan
+
 ENTRYPOINT ["python3", "autoscan.py"]