Hint enabling cache if not already enabled.

src/model/cache.js

@@ -0,0 +1,23 @@
+import fs from 'fs';
+import Action from './action';
+import Project from './project';
+
+class Cache {
+  static verify() {
+    if (!fs.existsSync(Project.libraryFolder)) {
+      this.notifyAboutCachingPossibility();
+    }
+  }
+
+  static notifyAboutCachingPossibility() {
+    if (Action.isRunningLocally) {
+      return;
+    }
+
+    console.log('Library folder does not exist.');
+    console.log('Consider setting up caching to speed up your workflow.');
+    console.log('If this is not your first build.');
+  }
+}
+
+export default Cache;