feat: Add Skeleton to MessageItem before the backend returns a message and fixed the issue where ChatConfigurationModal displays old data when creating a new dialog (#99)

feat: set width of chunk text to 100% and add Skeleton to Preview of document and remove react-pdf (#94)

feat: display all pdf pages and add DocumentPreview (#88)

feat: set proxy of backend api (#83)

feat: add nginx.conf (#80)

feat: layout the knowledge list page and modify the page switching button in the header (#48)

feat: prevent the user from entering the knowledge base if he is not logged in (#45)

feat: install prettier to format code and add react-dev-inspector to locate code in the IDE faster (#44)

update port (#36)

update knowledge_kb (#34)

add front end code (#27)