Add environment variable for each flag

[synackd]

Summary and Scope

Provide an environment variable for each flag to make configuration using Docker and docker-compose easier. Also, organize the parsing of these variables, as well as the program's flags, into their own separate functions for better readability for organization. Also, for each flag in the usage message, print its corresponding environment variable. For example:

  -insecure
        (BSS_INSECURE) Don't enforce https certificate security

in the above, setting BSS_INSECURE=true would be equivalent to passing the -insecure flag.

Issues and Related PRs

• Addresses [Quality] Update BSS database handling code to use migrations and favor environment variables for config #5

Testing

Tested on:

• Cable Guys SI Cluster (cg-head and compute nodes)
  • This is a system of x86-64 Gigabyte 272-Z32-00 machines running Rocky Linux 8.8

[alexlovelltroy]

Adding #8 to leave appropriate breadcrumbs without further delaying the merge of this code.