added flask docker scaffolding

src/webui/Dockerfile

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+FROM python:3.9-slim
+RUN apt-get update && apt-get install -y \
+    gcc  \
+    && rm -rf /var/lib/apt/lists/*
+RUN pip install flask==5.6.0
+ADD ./run.sh /run.sh
+RUN chmod +x /run.sh
+EXPOSE 5000
+CMD /run.sh

src/webui/run.sh

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+#!/bin/sh
+
+# We need to add a empty Data.fs if it does not exist
+# as zeo will not start without on.
+if [ ! -f /var/zeo/fs/Data.fs ]; then
+    touch /var/zeo/fs/Data.fs
+fi
+
+exec /usr/local/bin/runzeo -a 8100 -C /etc/zeo.conf