DOC: Incorporate pending suggestions from old PR#10

[ashokdevtron]

Link: #10

Line 75: We need to elaborate a bit on how the image descriptor is used, what changes is the user suppose to do our how will they get the values in their chart / values.yaml

Line 93: Include examples in table

Line 97, 98: why and when will a user need this?

Line 117-120: is this dependent on deployment strategy ?

Line 130: is this structure related to the image descriptor?

Line 139: what are significance of these keys?

Line 144: what other values are available with me?