Mention emails are printed in run-dev.py console.

Fixes: #1046

templates/zerver/accounts_send_confirm.html

@@ -6,6 +6,9 @@
   <div class="app-main portico-page-container">
             <h2>{{ _("Thanks for signing up!") }}</h2>
             <p class="lead">{{ _("Check your email so we can get started") }}.</p>
+            {% if development_environment %}
+                <div class="alert alert-info" style="display:inline-block;">{{ _("In the Zulip development environment, outgoing emails are printed to the run-dev.py console") }}</div>
+            {% endif %}
 
             <p>{% trans %}Still no email? We can <a href="#" id="resend_email_link">resend it</a>{% endtrans %}.<br/>
             <small>({{ _("Just in case, take a look at your Spam folder") }}.)</small></p>

zerver/context_processors.py

@@ -25,6 +25,7 @@ def add_settings(request):
         'password_auth_enabled':     password_auth_enabled(realm),
         'dev_auth_enabled':          dev_auth_enabled(),
         'google_auth_enabled':       google_auth_enabled(),
+        'development_environment':   settings.DEVELOPMENT,
     }
 
 def add_metrics(request):