Move changelog loading to server

Summary: per title

Reviewed By: aigoncharov

Differential Revision: D32723706

fbshipit-source-id: ce5108da9f5da6fdfa7d1a66a31a4f8f430eb78d

desktop/flipper-server-core/src/utils/pathUtils.tsx

@@ -30,7 +30,16 @@ export function getStaticPath(
     : absolutePath;
 }
 
-export function getChangelogPath() {
+export async function getChangelog() {
+  return (
+    await fs.promises.readFile(
+      path.join(getChangelogPath(), 'CHANGELOG.md'),
+      'utf8',
+    )
+  ).trim();
+}
+
+function getChangelogPath() {
   const changelogPath = getStaticPath(isFBBuild ? 'facebook' : '.');
   if (fs.existsSync(changelogPath)) {
     return changelogPath;