added wget to webui

src/webui/Dockerfile

@@ -1,6 +1,7 @@
 FROM python:3.9-slim
 RUN apt-get update && apt-get install -y \
     gcc  \
+    wget \
     && rm -rf /var/lib/apt/lists/*
 RUN pip install ZEO==5.2.1
 RUN pip install flask