[DOCS] Update Hosting-the-app.md

[Akash190104]

There were a lot of grammatical errors and typos that I fixed to improve the readability of the document.

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[dartpain]

@holopin-bot @Akash190104 Thank you!

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[codecov]

Codecov Report

Merging #406 (d9fc2a9) into main (77f7ad3) will not change coverage.
Report is 10 commits behind head on main.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #406   +/-   ##
=======================================
  Coverage   16.01%   16.01%           
=======================================
  Files          59       59           
  Lines        2667     2667           
=======================================
  Hits          427      427           
  Misses       2240     2240           

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