remove unnecessary /etc/gso folder

Dockerfile

@@ -12,10 +12,8 @@ RUN pip install \
     --target /app \
     geant-service-orchestrator==${ARTIFACT_VERSION}
 
-# Create the directory for the configuration and copy the example config into it
-# NOTE: a real config must be mounted at /etc/gso/config.json when running the container
-RUN mkdir -p /etc/gso && \
-    chown -R appuser:appgroup /etc/gso
+# Copy an example config into the container
+# NOTE: a real config must be mounted at /app/config.json when running the container
 COPY --chown=appuser:appgroup gso/oss-params-example.json /app/config.json
 
 # The app reads the configuration from this location.