Simple web hosting vs cloud storage with 500,000 daily users

I have a mobile game with 500,000 daily sessions, with avarage session length of 28 minutes.

I am about to add feature, where players will be able to load image from my server within the game (game tips)

In the begining I wanted to use the easiest solution (in my subjective opinion) to put all images on the same server where we host our website,

but I started being concerned about performance, taking into consideration number of players I have, it would be bad if image loading time would be

long when for example many players would be doing this action at the same time (max image size is around 60kb, each player would only needed to load game tip once per

level, each level usually takes 1-15 mins to complete, tips are not compulsory to view, only if players wants to)

This question is probably to broad, but is it okay to use basic website hosting server for similar purposes, or better to use some sort of cloud storage such az Firebase.