Remove the hamburger icon and change the color of buttons

[tannudaral]

• The hamburger icon (three lines icon) has no functionality on the page and is therefore, not needed.

• The border color of the "Join the Discord Server" button can be changed to white or a light grey but on hovering, the yellow can remain as it is currently.

• The color of the navbar items after the click, can be made better, my suggestion would be a white background for each item with a border radius of 4px.

[HrishabhCodes]

I have made these changes. Please, checkout my PR.

[kashish-d]

@Soumili1818 Are you working on this? Just wanted to check