Changed the image reference

docker/keybaseio-git-client/Dockerfile

@@ -0,0 +1,11 @@
+FROM keybaseio/client:stable
+
+RUN apt-get update \
+    && apt-get install -y \
+         bindfs \
+         git-lfs \
+    && rm -rf /var/lib/apt/lists/*
+
+# `bindfs` requires the mountpoint to exist.
+ARG MOUNTPOINT='/repos.rw'
+RUN mkdir -p "$MOUNTPOINT"