Manage NSG GitHub Action Dockerfile

Dockerfile

FROM mcr.microsoft.com/azure-cli:2.8.0
# Copies your code file from your action repository to the filesystem path `/` of the container.
COPY entrypoint.sh /entrypoint.sh
# Set the missing exec permission, just in case if you're on on a *nix. 
RUN chmod +x ./entrypoint.sh
# Enable dig to find the runner's public IP
RUN apk update && apk add --no-cache bind-tools && rm -rf /var/cache/apk/*
# Code file to execute when the docker container starts up (`entrypoint.sh`)
ENTRYPOINT ["/entrypoint.sh"]