Update onboarding Step 2 description to clarify Njal.la account/domain/Dynamic record flow

app/sovran_systemsos_web/templates/onboarding.html

@@ -72,7 +72,8 @@
           <h2 class="onboarding-step-title">Domain Configuration</h2>
           <p class="onboarding-step-desc">
             Sovran_SystemsOS uses <strong><a href="https://njal.la" target="_blank" style="color: var(--accent-color);">Njal.la</a></strong> for domains and Dynamic DNS.
-            For each service, enter the subdomain you purchased on Njal.la and paste the DDNS curl command from your Njal.la dashboard.
+            First, create an account at Njal.la and purchase your domain. Then, create a <strong>Dynamic</strong> DNS record in the Njal.la web interface pointing to this machine's external IP address (shown below).
+            Finally, paste the DDNS curl command from your Njal.la dashboard for each service below.
           </p>
         </div>
         <div class="onboarding-card onboarding-card--scroll" id="step-2-body">
@@ -198,4 +199,4 @@
 
   <script src="/static/onboarding.js?v={{ onboarding_js_hash }}"></script>
 </body>
-</html>
+</html>