It's too slow to open the website with azure & flask

Question

Hi I moved to azure because I know that it 's faster than a regular Hosting and if I need more resources I can pay more and get them.. the thing is that I installed a website in python 3 with flask. the resources in azure that I am using they are:

• App service with this plan: Basic B3.
• Azure database for MySQL

I have a no picture website it's just html a very simple webiste, but the issue is that it is super slow, I do not know why? when I will enter for first time is even more slow.. so I wonder what could it be? I use same website in local and it works perfectly, but it works super slow when I upload it and start to use in azure..

You can check it [https://erpjis.azurewebsites.net/]

I really need a help.. Thanks !