update to instruction about docker build to specific branch build
update to instruction about docker build to specific branch build

WNPRC-EHR-Services/wnprc-modules,WNPRC-EHR-Services/wnprc-modules,WNPRC-EHR-Services/wnprc-modules,WNPRC-EHR-Services/wnprc-modules,WNPRC-EHR-Services/wnprc-modules,WNPRC-EHR-Services/wnprc-modules,WNPRC-EHR-Services/wnprc-modules