Missing fields in backend config.json, missing shell in manually created docker

[gwhizoftv]

Describe the bug
We need more fields in config.json when deploying from source, creating the docker and running the backend, folliowng this guide:
https://appbuilder-docs.agora.io/turn-key/guides/Backend/Deploy-from-Source

To Reproduce

1. See existing config.json in the repo. These are missing:
2. "POSTGRES_USER":"yourpgadmin",
   "POSTGRES_PASSWORD":"youpgpasswd",
   "POSTGRES_DB":"yourdbname",
   "LOG_LEVEL":"DEBUG"

Expected behavior
We should see these fields

Environment (please complete the following information):

• Deployment Method Source->docker
• Go Version We cannot access the running docker to run go version. Dockerfile says:
  FROM golang:1.15.1 as build-env

Additional context
There doesn't seem to be a shell within the docker image.
All these fail:
464 docker exec -it server bash
465 docker exec -it server sh
466 docker exec -it server /usr/local/bin/sh
467 docker exec -it server /usr/local/bin/bash
468 docker exec -it server /srv/bash
469 docker exec -it server /usr/bin/env sh
470 docker exec -it server /usr/bin sh
471 docker exec -it server /usr/bin bash
472 docker exec -it server bash
473 docker exec -it server zsh

Backtrace

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