docs(README): add hint about verbose option for compilation output

README.md

@@ -34,7 +34,7 @@ Windows user should check out this step-by-step guide to setting up Jekyll on Wi
 
 ### Step 4. Run the Jekyll server
 
-You can run the Jekyll service locally with `bundle exec jekyll serve --baseurl=""`. This will compile the site and start serving the content locally. Once it's ready, you can open your browser and visit `http://localhost:4000` to see your local version of the site.
+You can run the Jekyll service locally with `bundle exec jekyll serve --baseurl=""`. This will compile the site and start serving the content locally. Since compiling can take a while, you can add the option `-V` to get a more verbose output and information about the running compilation steps. Once it's ready, you can open your browser and visit `http://localhost:4000` to see your local version of the site.
 
 ### Step 5. Make your changes and commit