diff --git a/ui/.devcontainer/Dockerfile b/ui/.devcontainer/Dockerfile
index cdad778..a9858df 100644
--- a/ui/.devcontainer/Dockerfile
+++ b/ui/.devcontainer/Dockerfile
@@ -5,9 +5,15 @@ FROM mcr.microsoft.com/vscode/devcontainers/javascript-node:0-${VARIANT}
 # [Optional] Uncomment this section to install additional OS packages.
 # RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
 #     && apt-get -y install --no-install-recommends <your-package-list-here>
-RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
-    && apt-get -y install --no-install-recommends git-lfs \
-    && su node -c "git lfs install"
+
+RUN set -ex; \
+    \
+    export DEBIAN_FRONTEND=noninteractive; \
+    apt-get update; apt-get install --yes --no-install-recommends \
+        git-flow \
+        git-lfs \
+    ; rm -rf /var/lib/apt/lists/*; \
+    su node -c "git lfs install"
 
 # [Optional] Uncomment if you want to install an additional version of node using nvm
 # ARG EXTRA_NODE_VERSION=10