Fix shell of host image

host/Dockerfile

@@ -15,4 +15,6 @@ RUN apt-get update && \
         traceroute \
         && rm -rf /var/lib/apt/lists/*
 
-    CMD [ "sh", "-c", "cd; exec bash -i" ]
+COPY start.sh /start.sh
+EXPOSE 80
+CMD ["/bin/sh", "/start.sh"]

host/start.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+while true; do /bin/bash; done