Use Environment variables instead of hardcoded values for API urls and keys

[nirvanaitsolutions]

Is your feature request related to a problem? Please describe.
Keeping the environment variables in the codebase is a bad practice and highly prone to a security attack if exploited.

Describe the solution you'd like
A We want all the environment variables to be loaded from an environment config.

Describe alternatives you've considered
This feature can be implemented via environments feature by angular-cli or via dotenv npm package.
Additional context
This feature is related to security and needed in alpha and later releases.