Proofreading the new Azure deployment article

Many minor changes to make things shorter and just a little more lively :)
Fixing typo
Lots of fixes thanks to @xabbuh and @stof!
minor #3968 Proofreading the new Azure deployment article (weaverryan)

This PR was merged into the 2.3 branch.

Discussion
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Proofreading the new Azure deployment article

Hi guys!

| Q             | A
| ------------- | ---
| Doc fix?      | no
| New docs?     | no
| Applies to    | 2.3
| Fixed tickets | -

This is a proofread of #3963 - just with minor (non-technical) changes for readability, etc. I made a quite a lot of changes, so please let me know where I made some mistakes - which I almost definitely have :). Ping also @hhamon!

Thanks!

Commits
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5115183 Lots of fixes thanks to @xabbuh and @stof!
efb8089 Fixing typo
240ef9d Proofreading the new Azure deployment article