fix: Make Background Size Flexible

[theanantchoubey]

This PR Resolves #42, It makes the size of the background flexible to the content and sets it minimum to 100vh to avoid the multi-background color issue.

Before (At Bottom)

After

[vercel[bot]]

Someone is attempting to deploy a commit to a Personal Account owned by @Balastrong on Vercel.

@Balastrong first needs to authorize it.

[theanantchoubey]

Next time I will raise my standards and contribute something more meaningful. :)