'Where and how to import custom Object prototype properties file which is required globally in gatsby during develop & build step?

CONTEXT :

I have a typescript file which contains CUSTOM OBJECT PROTOTYPE functions / properties.
This file ( utils.ts ) should be available globally when the app starts and should extend the existing Object prototype.
Importing this file gatsby-browser.js is working in gatsby develop mode.
When building / deploying this fails.

QUESTION :

How and where should i import these kind of files in gatsby, so that it's available during build phase globally ?

typescript gatsby

Sources

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Source: Stack Overflow

Solution	Source