[Feature] improve containerized dev env - makefile and compose file

[iknowright]

Types of changes

Feature

• [ ] Bugfix
• [x] New feature
• [x] Refactoring
• [ ] Breaking change (any change that would cause existing functionality to not work as expected)
• [ ] Documentation Update
• [ ] Other (please describe)

Description

Describe what the change is

• Remove enter_dev_env.sh, I think we could deprecate it as it was using the old compose cli scheme
• Remove docker-compose-db.yml, I think it is extra as we can simply use the compose command to spin up a service using the service name, and we can merge the db and pycontw service into 1 compose file
• For the first time to up the compose for dev, Django needs to wait for db to be ready, so I added psql client to the docker file
• db can share between local development and containerized dev development
• makefile has an init command to help local development spin up the project, other commands need to refer to docs instead
• update docs accordingly

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 73.99%. Comparing base (0fa2454) to head (08915ad). Report is 5 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1198 +/- ## ======================================= Coverage 73.99% 73.99% ======================================= Files 81 81 Lines 3057 3057 ======================================= Hits 2262 2262 Misses 795 795 ```

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[iknowright]

Hi @mattwang44 , 已修正修正上述問題。再麻煩 review 一下。謝謝。

[SivanYeh]

I tried "deploy_docker_dev" on my local and it worked well~