Fix kayobe user id usage

Author: Alex-Welsh

docker/kayobe/Dockerfile

@@ -58,7 +58,6 @@ RUN python3 -m pip install docker six
 ENV KAYOBE_USER=stack
 ARG KAYOBE_USER_UID=1000
 ARG KAYOBE_USER_GID=1000
-
 RUN groupadd -g $KAYOBE_USER_GID -o stack &&  \
     useradd -u $KAYOBE_USER_UID -g $KAYOBE_USER_GID \
     -G wheel -m -d /stack \
@@ -87,7 +86,8 @@ RUN chmod 600 /stack/.ssh/config
 COPY .automation/utils/kayobe-automation-activate .automation.conf/docker*/kayobe/bin/* /usr/local/bin/
 
 # Control host bootsrap without leaving kayobe-config in the image
-RUN --mount=type=ssh,uid=1000 --mount=type=tmpfs,target=/tmp/src --mount=type=bind,source=.,target=/src sudo cp -rfp /src /tmp/ && \
+ARG KAYOBE_USER_UID=1000
+RUN --mount=type=ssh,uid=$KAYOBE_USER_UID --mount=type=tmpfs,target=/tmp/src --mount=type=bind,source=.,target=/src sudo cp -rfp /src /tmp/ && \
   sudo chown -Rf stack:stack /tmp/src && \
   # Strip the secrets so that we don't need to pass in a vault-password
   grep -lR "\$ANSIBLE_VAULT" /tmp/src | xargs rm -f && \