In email about report doi: mention post-facto signature

templates/email/email_report_made_citable.html

@@ -19,8 +19,13 @@
   {{ report.citation }}.
 </p>
 <p>
-  We thank you again very much for your contribution.<br/>
+  We thank you again very much for your valuable contribution.<br/>
   The SciPost Team
 </p>
+{% if report.anonymous %}
+<p>
+  P.S.: When submitting your Report, you chose to remain anonymous. We generally encourage (but in no way force) our referees to sign their Reports; should you wish to sign your existing (even old) Reports, simply navigate to your <a href="https://scipost.org/personal_page">personal page</a> under the Refereeing tab, where you will be able to sign your Reports (after which we will update their DOI metadata).
+</p>
+{% endif %}
 
 {% include 'email/_footer.html' %}

templates/email/email_report_made_citable.txt

@@ -8,4 +8,7 @@ by {{ report.submission.author_list }}\n
 has been ascribed DOI {{ report.doi_string }} (https://doi.org/{{ report.doi_string }}), and is thus now citable in the form:\n\n
 {{ report.citation }}.\n\n
 We thank you again very much for your contribution.\n
-The SciPost Team
+The SciPost Team\n\n
+{% if report.anonymous %}
+P.S.: When submitting your Report, you chose to remain anonymous. We generally encourage (but in no way force) our referees to sign their Reports; should you wish to sign your existing (even old) Reports, simply navigate to your personal page (at https://scipost.org/personal_page) under the Refereeing tab, where you will be able to sign your Reports (after which we will update their DOI metadata).\n
+{% endif %}