Added changelog for version 1.4.0.

appdefs.xml

@@ -102,6 +102,17 @@ section for more details.
   </documentation>
   <!-- Changelog of the application. -->
   <history>
+      <release>
+        <version>1.4.0</version>
+        <date>2017-11-20</date>
+        <change>Now using baseimage v3.1.3, which brings the following changes (from last used version):</change>
+        <change level="2">Upgraded S6 overlay to version 1.21.2.1.</change>
+        <change level="2">Enhanced integration of service dependencies functionality.</change>
+        <change level="2">Added a simple log monitor.</change>
+        <change level="2">Fixed race condition where container's exit code would not be the expected one.</change>
+        <change level="2">Fixed issue where application's GUI fails to displayed when accessing it through the web interface via standard ports 80/443.</change>
+        <change level="2">Fixed an issue where a self-disabled service could be restarted.</change>
+      </release>
       <release>
         <version>1.3.1</version>
         <date>2017-11-19</date>