TODO in the future

API

Add unit test for controller of API
Add more test scenario to reflect actual use case
Add startup service to continue scrape pending search result in case of unexpected shutdown of service
Add health check
WEB
Fix Login and Signup page to compatible with Safari and Google Chrome password keychain
Add polling request in keyword search result page to allow realtime update between web and api
Add backend for frontend instead of static file host on NGINX
HTML Retriever
Structure code into multiple file