Upgrade webpack (#4746)

* optimize code

* optimize code

* optimize code

* optimize dependences

* optimize code

frontend/config/webpack.entry.js

@@ -0,0 +1,54 @@
+const paths = require('./paths');
+
+const entryFiles = {
+  markdownEditor: "/index.js",
+  TCAccept: "/tc-accept.js",
+  TCView: "/tc-view.js",
+  userNotifications: "/user-notifications.js",
+  wiki: "/wiki.js",
+  fileHistory: "/file-history.js",
+  fileHistoryOld: "/file-history-old.js",
+  app: "/app.js",
+  draft: "/draft.js",
+  sharedDirView: "/shared-dir-view.js",
+  sharedFileViewMarkdown: "/shared-file-view-markdown.js",
+  sharedFileViewText: "/shared-file-view-text.js",
+  sharedFileViewImage: "/shared-file-view-image.js",
+  sharedFileViewVideo: "/shared-file-view-video.js",
+  sharedFileViewPDF: "/shared-file-view-pdf.js",
+  sharedFileViewSVG: "/shared-file-view-svg.js",
+  sharedFileViewAudio:  "/shared-file-view-audio.js",
+  sharedFileViewDocument: "/shared-file-view-document.js",
+  sharedFileViewSpreadsheet: "/shared-file-view-spreadsheet.js",
+  sharedFileViewUnknown: "/shared-file-view-unknown.js",
+  historyTrashFileView: "/history-trash-file-view.js",
+  fileView: "/file-view.js",
+  viewFileText: "/view-file-text.js",
+  viewFileDocument: "/view-file-document.js",
+  viewFileSpreadsheet: "/view-file-spreadsheet.js",
+  settings: "/settings.js",
+  repoHistory: "/repo-history.js",
+  repoSnapshot: "/repo-snapshot.js",
+  repoFolderTrash: "/repo-folder-trash.js",
+  orgAdmin: "/pages/org-admin",
+  sysAdmin: "/pages/sys-admin",
+  search: "/pages/search",
+  uploadLink: "/pages/upload-link",
+};
+
+const getEntries = (mode) => {
+  let entries = {};
+  Object.keys(entryFiles).forEach(key => {
+    let entry = [];
+    entry.push(require.resolve('./polyfills'));
+    if (mode === 'development') {
+      entry.push(require.resolve('react-dev-utils/webpackHotDevClient'));
+    }
+    entry.push(paths.appSrc + entryFiles[key]);
+
+    entries[key] = entry;
+  });
+  return entries;
+};
+
+module.exports = getEntries;