Dockerfile: Align the workdir path with gitlab

docker/code-analysis/Dockerfile

@@ -271,7 +271,7 @@ RUN \
 	cp dmtree/tr157/*.h /usr/include/libbbfdm/ && \
 	cp libbbf_api/*.h /usr/include/libbbf_api/
 
-WORKDIR /opt/work
+WORKDIR /builds/iopsys/
 
 # Prepare supervisor
 RUN mkdir -p /var/log/supervisor