build process (via Dockerfile) now timestamps build and that is exposed on about page

main.py

@@ -199,7 +199,19 @@ def about():
             todo=fp.read()
     except FileNotFoundError:
         todo="No TODOs defined - cannot find TODO file!?"
-    return render_template("about.html", commits=commits, bugs=bugs, todo=todo)
+    try:
+        with open( 'internal/build-date.txt', 'r' ) as fp:
+            if 'ENV' in os.environ:
+                build_info=os.environ['ENV'] 
+            else:
+                build_info="Development"
+            build_info = build_info + " version built on: " + fp.read()
+    except FileNotFoundError:
+        if 'ENV' not in os.environ or os.environ['ENV'] == "development":
+            build_info="Development version"
+        else:
+            build_info="No build info found!?"
+    return render_template("about.html", commits=commits, bugs=bugs, todo=todo, build_info=build_info)
 
 @app.route('/logout')
 @login_required