[Backend] Use config file to store secret access keys cloud

[asyafalni]

Is your feature request related to a problem? Please describe.

• Seeding database currently requires .env file in order to read secret access key cloud,
• Dotenv should be used for development only, expect ENV for production from direct yaml config

Describe the solution you'd like
Separate secret access keys data to config file (json / yaml) instead of .env file