Pushing empty docker config json (#2082)

try pushing empty json

.github/containers/codespaces/.devcontainer/Dockerfile

@@ -18,7 +18,7 @@ RUN if [ -z "$CLAB_VERSION" ]; then \
 RUN bash -c "$(curl -sL https://get-gnmic.openconfig.net)" && bash -c "$(curl -sL https://get-gnoic.kmrd.dev)"
 
 # add empty docker config files to avoid clab warnings for root user
-RUN mkdir -p /root/.docker && touch /root/.docker/config.json
+RUN mkdir -p /root/.docker && echo "{}" > /root/.docker/config.json
 
 # vscode user is created in the MS devcontainer image
 USER vscode
@@ -30,7 +30,7 @@ RUN ssh-keygen -t ecdsa -b 256 -N "" -f ~/.ssh/id_ecdsa
 RUN bash -c "$(curl https://pyenv.run)"
 
 # add empty docker config files to avoid clab warnings for vscode user
-RUN mkdir -p /home/vscode/.docker && touch /home/vscode/.docker/config.json
+RUN mkdir -p /home/vscode/.docker && echo "{}" > /home/vscode/.docker/config.json
 
 # setup zsh/oh-my-zsh
 COPY ./zsh/.zshrc /home/vscode/.zshrc