link to lecture overview added

Author: chauff

Lecture-1.md

@@ -1,6 +1,6 @@
 # HTTP: the language of Web communication <!-- omit in toc -->
 
-[Overview of all Lecture 1 materials](Readme.md#lecture-1)
+:point_right: [Overview of all Lecture 1 materials](README.md#lecture-1)
 
 ## Table of Content <!-- omit in toc -->
 

Lecture-2.md

@@ -1,5 +1,7 @@
 # HTML: the language of the Web <!-- omit in toc -->
 
+:point_right: [Overview of all Lecture 2 materials](README.md#lecture-2)
+
 ## Table of Content <!-- omit in toc -->
 - [Learning goals](#learning-goals)
 - [Web sites vs. web applications vs. the web as a platform](#web-sites-vs-web-applications-vs-the-web-as-a-platform)

Lecture-3.md

@@ -1,5 +1,7 @@
 # JavaScript: the language of browser interactions <!-- omit in toc -->
 
+:point_right: [Overview of all Lecture 3 materials](README.md#lecture-3)
+
 *This is the densest web lecture of this course. Learning how to code takes time. Take a look at the [exercises](nodeschool-exercises.md) that are relevant for this lecture.*
 
 *At times we use :point_up: and :point_down: to make it clear whether an explanation belongs to the code snippet above or below the text. The :bangbang: sign is added to code examples you should run yourself.*

Lecture-4.md

@@ -1,5 +1,9 @@
 # Node.js: JavaScript on the server <!-- omit in toc -->
 
+:point_right: [Overview of all Lecture 4 materials](README.md#lecture-4)
+
+*At times we use :point_up: and :point_down: to make it clear whether an explanation belongs to the code snippet above or below the text. The :bangbang: sign is added to code examples you should run yourself.*
+
 ## Table of Content <!-- omit in toc -->
 - [Learning goals](#learning-goals)
 - [Introduction to Node.js](#introduction-to-nodejs)

Lecture-5.md

@@ -1,5 +1,9 @@
 # CSS: the language of web design <!-- omit in toc -->
 
+:point_right: [Overview of all Lecture 5 materials](README.md#lecture-5)
+
+*At times we use :point_up: and :point_down: to make it clear whether an explanation belongs to the code snippet above or below the text. The :bangbang: sign is added to code examples you should run yourself.*
+
 ## Table of Content <!-- omit in toc -->
 
 - [Learning goals](#learning-goals)

Lecture-6.md

@@ -1,5 +1,9 @@
 # Advanced Node.js <!-- omit in toc -->
 
+:point_right: [Overview of all Lecture 6 materials](README.md#lecture-6)
+
+*At times we use :point_up: and :point_down: to make it clear whether an explanation belongs to the code snippet above or below the text. The :bangbang: sign is added to code examples you should run yourself.*
+
 ## Table of Content <!-- omit in toc -->
 - [Learning goals](#learning-goals)
 - [Organization and reusability of Node.js code](#organization-and-reusability-of-nodejs-code)

Lecture-7.md

@@ -1,5 +1,9 @@
 # Cookies, sessions and third-party authentication <!-- omit in toc -->
 
+:point_right: [Overview of all Lecture 7 materials](README.md#lecture-7)
+
+*At times we use :point_up: and :point_down: to make it clear whether an explanation belongs to the code snippet above or below the text. The :bangbang: sign is added to code examples you should run yourself.*
+
 ## Table of Content <!-- omit in toc -->
 - [Learning goals](#learning-goals)
 - [Recall the HTTP lecture](#recall-the-http-lecture)

Lecture-8.md

@@ -1,5 +1,9 @@
 # Web security <!-- omit in toc -->
 
+:point_right: [Overview of all Lecture 8 materials](README.md#lecture-8)
+
+*At times we use :point_up: and :point_down: to make it clear whether an explanation belongs to the code snippet above or below the text. The :bangbang: sign is added to code examples you should run yourself.*
+
 ## Table of Content <!-- omit in toc -->
 - [Learning goals](#learning-goals)
 - [Introduction](#introduction)