Refactor/clean the CI

[TAnas0]

Is your feature request related to a problem? Please describe. Refactor the following to simplify it:

• [x] Remove Travis CI environment variables
• [x] Conditional execution of GA jobs
• [x] Remove all remnants of staging environment
• [x] Remove Vault related K8s YAML files
• [x] Remove docker.sh script
• [x] Review Docker Compose setup: make sure it fully works, use a script as entrypoint
• This will be moved to a separate issue: IMPORTANT Make sure that no secrets are embedded in the Docker images

Delete the respective Github Secrets to each cleaned up code

[Siddhant-K-code]

I have worked something like this for codacy, I Can Work on this! :)

[andrewtpham]

@Siddhant-K-code same for this, let's come to this in after a few other tasks 👏