Fix Dockerfile

Author: VolkerHartmann

Dockerfile

@@ -73,7 +73,7 @@ RUN mkdir -p ${SERVICE_DIRECTORY}
 WORKDIR ${SERVICE_DIRECTORY}
 COPY --from=build-service-metastore2 ${SERVICE_DIRECTORY} ./
 
-EXPORT PYTHONIOENCODING=UTF-8
+ENV PYTHONIOENCODING=UTF-8
 
 # Define repo port 
 EXPOSE ${REPO_PORT}