add description to images (#2412)

Author: Arhell

docs/basics.md

@@ -695,7 +695,7 @@ I.say('This is by default'); //cyan is used
 
 ## IntelliSense
 
-![](/img/edit.gif)
+![Edit](/img/edit.gif)
 
 To get autocompletion when working with CodeceptJS, use Visual Studio Code or another IDE that supports TypeScript Definitions.
 

docs/testcafe.md

@@ -7,7 +7,7 @@ title: Testing with TestCafe
 
 [TestCafe](https://devexpress.github.io/testcafe/) is another alternative engine for driving browsers. It is driven by unique technology which provides fast and simple cross browser testing for desktop and mobile browsers. Unlike WebDriver or Puppeteer, TestCafe doesn't control a browser at all. It is not a browser itself, like [Nightmare](/nightmare) or Cypress. **TestCafe core is a proxy server** that runs behind the scene, and transforms all HTML and JS to include code that is needed for test automation.
 
-![](/img/testcafe.png)
+![Testcafe](/img/testcafe.png)
 
 This is very smart idea. But to use TestCafe on daily basis you need to clearly understand its benefits and limitations:
 

docs/videos.md

@@ -7,7 +7,7 @@ editLink: false
 ---
 
 > Add your own videos to our [Wiki Page](https://github.com/Codeception/CodeceptJS/wiki/Videos)
-[![](http://i3.ytimg.com/vi/BRMWstiOTks/maxresdefault.jpg)](https://www.youtube.com/watch?v=BRMWstiOTks)
+[![Maxresdefault](http://i3.ytimg.com/vi/BRMWstiOTks/maxresdefault.jpg)](https://www.youtube.com/watch?v=BRMWstiOTks)
 
 * ## [An Introduction, Getting started and working with CodeceptJS & Puppeteer (EAWeekend)](https://www.youtube.com/watch?v=BRMWstiOTks)