Use correct server URL in docs site API spec explorers (aptos-labs#5707)

developer-docs-site/src/components/ApiExplorer/index.tsx

@@ -1,24 +1,47 @@
-import React from "react";
+import React, { useEffect, useState } from "react";
 import { API } from "@stoplight/elements";
 import BrowserOnly from "@docusaurus/BrowserOnly";
 // TODO: Look into defining source order for compiling from component earlier to prevent specificity issues
 // import "@stoplight/elements/styles.min.css";
 
-const ApiExplorer = ({ network, layout }: ApiExplorerProps) => (
+const ApiExplorer = ({ network, layout }: ApiExplorerProps) => {
+  const [specContent, setSpecContent] = useState(null);
+
+  useEffect(() => {
+    let isMounted = true;
+
+    const fetchAndFixSpec = async () => {
+      // Get the spec file.
+      const data = await fetch(`https://raw.githubusercontent.com/aptos-labs/aptos-core/${network}/api/doc/spec.json`);
+      // Convert the data to json.
+      const json = await data.json();
+      // Change the `servers` field in the spec file to point to the public
+      // API fullnode for that network.
+      json.servers = [{ url: `https://fullnode.${network}.aptoslabs.com/v1` }];
+      // Set state with the updated spec.
+      if (isMounted) {
+        setSpecContent(json);
+      }
+    };
+
+    // Call the function to get and fix the spec.
+    fetchAndFixSpec().catch((err) => console.log(`Error fetching spec: ${err}`));
+
+    return () => {
+      isMounted = false;
+    };
+  }, []);
+
   // BrowserOnly is important here because of details re SSR:
   // https://docusaurus.io/docs/advanced/ssg#browseronly
-  <BrowserOnly fallback={<div>Loading...</div>}>
-    {() => {
-      return (
-        <API
-          apiDescriptionUrl={`https://raw.githubusercontent.com/aptos-labs/aptos-core/${network}/api/doc/spec.yaml`}
-          router="hash"
-          layout={layout}
-        />
-      );
-    }}
-  </BrowserOnly>
-);
+  return (
+    <BrowserOnly fallback={<div>Loading...</div>}>
+      {() => {
+        return <API apiDescriptionDocument={specContent} router="hash" layout={layout} />;
+      }}
+    </BrowserOnly>
+  );
+};
 
 interface ApiExplorerProps {
   network: string;