Auto json or csv on grafana server

Hello Guys,

1: I have a Json data file, and i want to import this file into Grafana to create a new dashboard with that data.
2: I created a JSON Server using
3: I tried to use JSON DATASOURCE PLUGIN and i had connected to my json server (https://server:3000/)
4: My grafana wasn’t able to connect with my json server, and i no have any data.

Q: How do i import a json or csv or xml on my grafana Server for create a table dashboard with data lines.

Sorry for my bad english!