proxy-image needs git to get the build hash.

proxy-image/Dockerfile

@@ -1,5 +1,7 @@
 FROM python:3.7-slim 
-RUN useradd -u 1000 -ms /bin/bash python 
+RUN useradd -u 1000 -ms /bin/bash python && \
+apt update && \
+apt install -y git
 WORKDIR /home/python
 USER python
 RUN python -m venv /home/python/venv