Update azure-deploy.sh to be macOS compatible

[siddharth-krishna]

MacOS's xargs doesn't have a -d option to specify the delimiter. I'm using the solution proposed in: https://stackoverflow.com/questions/71409366/how-do-i-work-around-macos-x-not-having-xargs-d

[yorek]

I did some research and there are two options, it seems:

1) use the -0 option instead of -d 2) completely change approach and use

set -o allexport
source $FILE
set +o allexport

to handle the ./env file

the second option seems a bit too naive to me so I'm going with the -0. I'll test it ASAP to make sure it works

[yorek]

Merged, thanks!