feat: Convert all app files to JS

packages/backend/src/apps/strava/auth/refresh-token.js

@@ -0,0 +1,20 @@
+const refreshToken = async ($) => {
+  const params = {
+    client_id: $.auth.data.clientId,
+    client_secret: $.auth.data.clientSecret,
+    grant_type: 'refresh_token',
+    refresh_token: $.auth.data.refreshToken,
+  };
+
+  const { data } = await $.http.post('/v3/oauth/token', null, { params });
+
+  await $.auth.set({
+    accessToken: data.access_token,
+    expiresIn: data.expires_in,
+    expiresAt: data.expires_at,
+    tokenType: data.token_type,
+    refreshToken: data.refresh_token,
+  });
+};
+
+export default refreshToken;