Fix url for font

app/static/style.css

@@ -1,7 +1,7 @@
 @font-face
 {
     font-family: STIX;
-    src: url("http://127.0.0.1:5000/static/STIX2Text-Regular.subset.otf") format("truetype");
+    src: url("/static/STIX2Text-Regular.subset.otf") format("truetype");
 }
 
 body