This commit fixes a failure scenario caused when the UID of the user within the hugo-extended container does not match the UID or GID of the respective user and group ownership assigned to the files and directories in the volume mounted to /src.

The failure occurs when a git operation triggers recently added safe directory checks to alert the user when there is a UID or GID mismatch.  Because the ENTRYPOINT of the hugo-extended container is a call to `hugo`, there is no ability for the end user of the container to tell git to trust the /src directory before hugo is started.

It is possible to override the UID and GID when using the container, but this causes permission errors and does not seem like a user-friendly path forward.

After this change, the hugo-extended container will contain a global git configuration to trust the /src directory.  This may have security implications that have not been considered, but since only the project directory is mounted to /src, this approach seems to respect the intent of git safe directory checks.

Dockerfile

@@ -122,6 +122,8 @@ RUN set -euo pipefail && \
     fi && \
     # clean up some junk
     rm -rf /tmp/* /var/tmp/* /var/cache/apk/* && \
+    # tell git to trust /src 
+    git config --global --add safe.directory /src && \
     # make super duper sure that everything went OK, exit otherwise
     hugo env && \
     go version && \