Bash options cause "silent" bugs

Describe the bug

Most of our bash scripts don't sent common switches important to avoid unintended behaviors. Specifically many don't use set -o nounset which don't catch misspelled / not provided variables.
When this is added to certain scripts, it has a cascade affect on scripts that don't use it as we chain commands in our make targets (command1 && command2).

Steps to reproduce

• make build-api-image never used the "CI ACR" as the image name was using a non existing var visible here.
  The log example from one of the runs (pr bot):

11 importing cache manifest from ***.azurecr.io/:0.2.12
11 sha256:2fe49dad347b96f3d494163154bea9c19f4825505b5ac4478c0d055bc36f9996
11 ERROR: invalid reference format