Chore: Housekeeping tasks (#721)

- End point to return api version
- Move agent bot listener to sync dispatcher
- gem update

config/app.yml

@@ -0,0 +1,14 @@
+shared: &shared
+  version: '1.4.0'
+
+development:
+  <<: *shared
+
+production:
+  <<: *shared
+
+staging: 
+  <<: *shared
+
+test: 
+  <<: *shared