Avoid multiple hubzilla updates to the readme

src/freedombone-app-hubzilla

@@ -186,15 +186,17 @@ function hubzilla_create_database {
         else
             HUBZILLA_ADMIN_PASSWORD="$(create_password ${MINIMUM_PASSWORD_LENGTH})"
         fi
-        echo '' >> /home/$MY_USERNAME/README
-        echo '' >> /home/$MY_USERNAME/README
-        echo '# Hubzilla' >> /home/$MY_USERNAME/README
-        if [[ $ONION_ONLY == 'no' ]]; then
-            echo $"Open https://$HUBZILLA_DOMAIN_NAME and register a new user" >> /home/$MY_USERNAME/README
-        else
-            echo $"Open http://$HUBZILLA_ONION_HOSTNAME and register a new user" >> /home/$MY_USERNAME/README
+        if ! grep "# Hubzilla" /home/$MY_USERNAME/README; then
+            echo '' >> /home/$MY_USERNAME/README
+            echo '' >> /home/$MY_USERNAME/README
+            echo '# Hubzilla' >> /home/$MY_USERNAME/README
+            if [[ $ONION_ONLY == 'no' ]]; then
+                echo $"Open https://$HUBZILLA_DOMAIN_NAME and register a new user" >> /home/$MY_USERNAME/README
+            else
+                echo $"Open http://$HUBZILLA_ONION_HOSTNAME and register a new user" >> /home/$MY_USERNAME/README
+            fi
+            echo $"Your MariaDB Hubzilla admin password is: $HUBZILLA_ADMIN_PASSWORD" >> /home/$MY_USERNAME/README
         fi
-        echo $"Your MariaDB Hubzilla admin password is: $HUBZILLA_ADMIN_PASSWORD" >> /home/$MY_USERNAME/README
         chown $MY_USERNAME:$MY_USERNAME /home/$MY_USERNAME/README
         chmod 600 /home/$MY_USERNAME/README
     fi