Update DockerPush.md

[Heyjude101]

Added a running commentary on optimization of Pipeline runtime.

[Ompragash]

@Heyjude101 Thanks for the PR!

Could you explain the need for this change?

[Ompragash]

@Heyjude101 Any updates on this, please?

[Heyjude101]

Sorry for the late reply @Ompragash . Didn't get notification first time. I was going through the docs and reading the best practices and found out how keeping the multiline arguments sorted helped when the file is very large as it was mentioned in the docs and I noticed how it was sorted here. Also wanted people to take a look at the pipeline optimization page which I found interesting. I hope this is the place for it :) (If not, should I create another file to share my takeaways from the docs? I guess that would be a better Idea! )