Add CI for feature server Docker image

[felixwang9817]

Signed-off-by: Felix Wang wangfelix98@gmail.com

What this PR does / why we need it: This PR is adding CI for building the feature server Docker image. Since the workflow cannot be tested in this PR, I will iterate on the workflow in later PRs.

Which issue(s) this PR fixes:

Fixes #

Does this PR introduce a user-facing change?:

NONE

[codecov-commenter]

Codecov Report

Merging #1925 (481d5c4) into master (b1ccf8d) will decrease coverage by 0.38%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1925      +/-   ##
==========================================
- Coverage   82.34%   81.96%   -0.39%     
==========================================
  Files          96       96              
  Lines        7490     7557      +67     
==========================================
+ Hits         6168     6194      +26     
- Misses       1322     1363      +41     

Flag	Coverage Δ
integrationtests	73.63% <ø> (-0.29%)	⬇️
unittests	59.93% <ø> (-0.21%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
sdk/python/tests/unit/test_feature_validation.py	83.33% <0.00%> (-16.67%)	⬇️
sdk/python/feast/flags_helper.py	89.47% <0.00%> (-4.65%)	⬇️
sdk/python/feast/on_demand_feature_view.py	86.15% <0.00%> (-2.56%)	⬇️
sdk/python/feast/feature_view.py	84.33% <0.00%> (-1.92%)	⬇️
sdk/python/feast/infra/aws.py	39.67% <0.00%> (-0.96%)	⬇️
sdk/python/feast/infra/provider.py	90.00% <0.00%> (-0.68%)	⬇️
sdk/python/feast/cli.py	38.69% <0.00%> (-0.58%)	⬇️
sdk/python/feast/feature_store.py	94.17% <0.00%> (-0.17%)	⬇️
sdk/python/feast/errors.py	70.00% <0.00%> (-0.08%)	⬇️
sdk/python/feast/flags.py	100.00% <0.00%> (ø)
... and 3 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update b1ccf8d...481d5c4. Read the comment docs.

[felixwang9817]

/kind housekeeping

[achals]

/lgtm

[feast-ci-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: achals, felixwang9817

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [achals,felixwang9817]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[woop]

@felixwang9817 you can also use your own repo if you just want to iterate quickly without actually going through a PR flow.

[feast-ci-bot]

New changes are detected. LGTM label has been removed.

[achals]

Lgtm. Retried integration tests.