Merge pull request #17 from files-ui/24-add-download-page-and-upload-page

public/serverside/nodeexpress.jpg

public/serverside/springbootjavalogo.png

public/videodemo/NarutoEN.mp4

src/components/MainMenu/MainMenuSideBar.tsx

...nents/MainPage/MainRight/FileMosaicImageVideoPreviews.tsx

...onents/demo-components/demo-download/CodeDemoDownload.tsx

...nents/demo-components/demo-download/CodeDemoDownload1.tsx

...nents/demo-components/demo-download/CodeDemoDownload3.tsx

...omponents/demo-components/demo-download/DemoDownload1.tsx

...omponents/demo-components/demo-download/DemoDownload2.tsx

...omponents/demo-components/demo-download/DemoDownload3.tsx

...components/demo-server-side/CodeDemoServerSideExpress.tsx

...mo-components/demo-server-side/CodeDemoServerSideJava.tsx

...s/demo-components/dropzone-demo/DemoDropzoneUploading.jsx

src/components/layout-pages/FooterPage.scss

src/components/layout-pages/FooterPage.tsx

src/components/layout-pages/MainContentContainer.jsx

...nts/dropzone/components/DropzoneHeader/DropzoneHeader.tsx

src/files-ui/components/file-card/FileCard.tsx

...ui/components/file-item/components/FileItem/FileItem.scss