add build image and deploy

[haofrank]

• add build task to pipeline
• add deploy task to pipeline
• update image name in deployment.yaml for pipline
• update deploy image requirement.txt, add BDD requirements

Test Step:

1. oc create -f .tekton/
2. start the pipeline on OpenShift
3. check pipeline run logs
4. oc get pod double check the pod is running

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (be792dc) 96.36% compared to head (18b1334) 96.36%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #71   +/-   ##
=======================================
  Coverage   96.36%   96.36%           
=======================================
  Files           8        8           
  Lines         330      330           
=======================================
  Hits          318      318           
  Misses         12       12           

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