added first pass of homepage

ui/src/api/docs.ts

@@ -0,0 +1,18 @@
+//  @ts-ignore
+const addr = import.meta.env.VITE_APIHOST;
+
+export async function getWelcomeMessage(): Promise<string> {
+    const res = await fetch(`${addr}/docs/welcome`, {
+        method: "GET",
+        credentials: 'include',
+    });
+    if (res.ok) {
+        const out = res.json();
+        if (!out) {
+            return null;
+        }
+        return out;
+    } else {
+        return null;
+    }
+}