This moves watchdog to a better name for images and also gives free
image-scanning and gives more confidence  to users  that components
ship regularly and makes any vulnerabilities  in  components  clear

Signed-off-by: Ivana Yovcheva (VMware) <iyovcheva@vmware.com>

Extend the health endpoint and add gateway version information

Resolves: #733
Signed-off-by: Edward Wilde <ewilde@gmail.com>

This changes introduces a new flag -version to watchdog which will
display version and SHA of last git commit.

Version and SHA are injected at build time and passed as a
build-args for Dockerfile.

Fixes: #632

Signed-off-by: Vivek Singh <vivekkmr45@yahoo.in>

Note, not all `alexellis/github` references should be changed, there are
a number of repos which are not part of the openfaas org, this commit
excludes those.

Signed-off-by: John McCabe <john@johnmccabe.net>

Signed-off-by: Alex Ellis <alexellis2@gmail.com>

Signed-off-by: Alex Ellis <alexellis2@gmail.com>

Signed-off-by: Alex Ellis <alexellis2@gmail.com>

Signed-off-by: Alex Ellis <alexellis2@gmail.com>