adding back docs

docs/step1-05/demo/src/App.tsx

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+import React from 'react';
+import { TodoFooter } from './components/TodoFooter';
+import { TodoHeader } from './components/TodoHeader';
+import { TodoList } from './components/TodoList';
+
+export class TodoApp extends React.Component {
+  render() {
+    return (
+      <div>
+        <TodoHeader />
+        <TodoList />
+        <TodoFooter />
+      </div>
+    );
+  }
+}

docs/step1-05/demo/src/components/TodoFooter.tsx

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+import React from 'react';
+
+export const TodoFooter = (props: any) => {
+  return (
+    <footer>
+      <p>footer</p>
+    </footer>
+  );
+};

docs/step1-05/demo/src/components/TodoHeader.tsx

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+import React from 'react';
+
+export class TodoHeader extends React.Component {
+  render() {
+    return <div />;
+  }
+}

docs/step1-05/demo/src/components/TodoList.tsx

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+import React from 'react';
+
+export class TodoList extends React.Component<any, any> {
+  render() {
+    return <div />;
+  }
+}

docs/step1-05/demo/src/components/TodoListItem.tsx

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+import React from 'react';
+
+export class TodoListItem extends React.Component {
+  render() {
+    return <div />;
+  }
+}

docs/step1-05/demo/src/index.tsx

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+import React from "react";
+import ReactDOM from "react-dom";
+import { TodoApp } from "./App";
+ReactDOM.render(<TodoApp />, document.getElementById("app"));

docs/step1-05/demo/src/style.css

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+body {
+  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
+  width: 400px;
+  margin: 20px auto;
+}
+
+h1 {
+  text-align: center;
+}
+
+.addTodo {
+  display: flex;
+}
+
+.textfield {
+  flex-grow: 1;
+  margin-right: 10px;
+}
+
+.submit {
+  border: none;
+  padding: 5px 10px;
+}
+
+.filter {
+  margin: 10px 0 0;
+}
+
+.filter button {
+  background: transparent;
+  border: none;
+}
+
+.filter .selected {
+  border-bottom: 2px solid blue;
+}
+
+.todos {
+  list-style: none;
+  padding: 0;
+}
+
+footer {
+  display: flex;
+}
+
+footer span {
+  flex-grow: 1;
+}