refactor(server): move constant into common package (#522)

* refactor(server): move constant into common package

* refactor(server): re-arrange import statement in microservice module

* refactor(server): move app.config into common package

* fix(server): e2e testing

server/libs/common/src/constants/index.ts

@@ -0,0 +1 @@
+export * from './upload_location.constant';

server/libs/common/src/constants/upload_location.constant.ts

@@ -0,0 +1 @@
+export const APP_UPLOAD_LOCATION = './upload';