Document springboot create app flow in smaller user story

[Preeticp]

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[Preeticp]

Fixed the create flow for springboot via #489
To Do: Fix the springboot flow for Che, build and pipelines section

[Preeticp]

TTD:
Create app user story
Changes needed to Create flow for Springboot:

Chpt 3

Step 1 update image for SB
check if images and instructions in step 2 and 3 need to be updated too

Chpt 4

Update images in step 2 and 4, also the last image could have app names as nodejs and SB

Chpt 5

step 2

Chpt 6

step 3 and 4

Check chpt 7, not sure if we need to replace the GH repo image

Chpt 9
check for images for confirmation mssgs: if not required delete. same for vertx and UG eg

Chpt 10
step 3 image and step 4

Chpt 11
step 1 instruction and image, step 2, and 3 instruction, step 4 image check

chpt 12
Remove sentence: When the commit succeeds, the following message displays:and the following image

[Preeticp]

Fixed via #490