Use relative URL for graph.json

src/index.ts

@@ -69,7 +69,7 @@ function drawNetwork() {
 	nodes.forEach(drawNode);
 }
 
-fetch("http://map.y.tau.rocks/graph.json")
+fetch("/graph.json")
 	.then(res => res.json())
 	.then(data => {
 		const nodeMap = {};