Feat: add example for build and push image

[FogDong]

Signed-off-by: FogDong dongtianxin.tx@alibaba-inc.com

Description of your changes

Fixes #

I have:

• Read and followed KubeVela's contribution process.
• Related Docs updated properly. In a new feature or configuration option, an update to the documentation is necessary.
• Run make reviewable to ensure this PR is ready for review.
• Added backport release-x.y labels to auto-backport this PR if necessary.

How has this code been tested

Special notes for your reviewer

[codecov]

Codecov Report

Base: 68.39% // Head: 68.32% // Decreases project coverage by -0.06% ⚠️

Coverage data is based on head (bef6447) compared to base (0e0ff8d).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #104      +/-   ##
==========================================
- Coverage   68.39%   68.32%   -0.07%     
==========================================
  Files          49       49              
  Lines        4351     4351              
==========================================
- Hits         2976     2973       -3     
- Misses        998     1000       +2     
- Partials      377      378       +1     

Flag	Coverage Δ
e2etests	25.48% <ø> (-0.08%)	⬇️
unit-test	65.27% <ø> (ø)

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

Impacted Files	Coverage Δ
controllers/workflowrun_controller.go	78.03% <0.00%> (-2.28%)	⬇️

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