Update from "tianon/docker-tianon" to "infosiftr/moby" (which is the successor to the prior image)

Author: tianon

Dockerfile

@@ -12,7 +12,7 @@ COPY . .
 RUN CGO_ENABLED=0 ./bashbrew.sh --version; \
 	cp -al bin/bashbrew /
 
-FROM tianon/docker-tianon
+FROM infosiftr/moby
 
 SHELL ["bash", "-Eeuo", "pipefail", "-xc"]