Simplify docker image building process

[mars-lan]

🤔 Why?

#919 improved the docker image rebuild speed but also introduced the requirement of manually generating requirement.txt.

🤓 What?

Use multi-stage builds to automatically generate requirements.txt file as part of docker build. Also updated doc & CD workflow accordingly

🧪 Tested?

 % docker build --platform linux/amd64 -t metaphordata/connectors .
  
[+] Building 17.0s (19/19) FINISHED                                                                           docker:desktop-linux
 => [internal] load build definition from Dockerfile                                                                          0.0s
 => => transferring dockerfile: 669B                                                                                          0.0s
 => [internal] load metadata for docker.io/library/python:3.8-slim                                                            0.9s
 => [auth] library/python:pull token for registry-1.docker.io                                                                 0.0s
 => [internal] load .dockerignore                                                                                             0.0s
 => => transferring context: 158B                                                                                             0.0s
 => [base 1/1] FROM docker.io/library/python:3.8-slim@sha256:f8b4609a66cdaa133fa57e2ca8e2f03de2ebb44ffefb4c0b8b2de782aefca4a  0.0s
 => [internal] load build context                                                                                             1.1s
 => => transferring context: 1.92MB                                                                                           1.1s
 => CACHED [builder 1/4] RUN pip install poetry                                                                               0.0s
 => [builder 2/4] COPY pyproject.toml poetry.lock src/                                                                        0.0s
 => [builder 3/4] WORKDIR /src                                                                                                0.0s
 => [builder 4/4] RUN poetry export     --without dev     --all-extras     --format=requirements.txt     --output=requiremen  1.9s
 => CACHED [runtime 1/8] RUN apt-get clean                                                                                    0.0s 
 => CACHED [runtime 2/8] RUN apt-get update                                                                                   0.0s 
 => CACHED [runtime 3/8] RUN apt-get install -y git build-essential libsasl2-dev                                              0.0s 
 => CACHED [runtime 4/8] COPY --from=builder /src/requirements.txt /dep/requirements.txt                                      0.0s 
 => CACHED [runtime 5/8] RUN pip install -r /dep/requirements.txt --no-deps                                                   0.0s
 => [runtime 6/8] COPY . src/                                                                                                 2.0s
 => [runtime 7/8] RUN pip install '/src[all]'                                                                                 9.9s
 => [runtime 8/8] RUN rm -rf /src                                                                                             0.4s 
 => exporting to image                                                                                                        0.4s 
 => => exporting layers                                                                                                       0.4s 
 => => writing image sha256:516c802c21af76dcb522ce57537f12f8c159669c35234b5e45badf72776b9d8b                                  0.0s 
 => => naming to docker.io/metaphordata/connectors                                                                            0.0s 

☑️ Checks

• My PR contains actual code changes, and I have updated the version number in pyproject.toml.

[github-actions]

☂️ Python Coverage

current status: ✅

Overall Coverage

Lines	Covered	Coverage	Threshold	Status
11788	10473	89%	85%	🟢

New Files

No new covered files...

Modified Files

No covered modified files...

updated for commit: ccdcd70 by action🐍

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.84%. Comparing base (46fca04) to head (ccdcd70).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #954   +/-   ##
=======================================
  Coverage   88.84%   88.84%           
=======================================
  Files         182      182           
  Lines       11788    11788           
=======================================
  Hits        10473    10473           
  Misses       1315     1315           

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[alyiwang]

LGTM