Add missing alt attributes.

Author: XhmikosR

locale/en/blog/module/multi-server-continuous-deployment-with-fleet.md

@@ -89,4 +89,4 @@ For help about a command, try `fleet help `.</pre>
 
 <p><span class="code">npm install -g fleet</span> and <a href="https://github.com/substack/fleet">check out the code on github</a>! </p>
 
-<img src="http://substack.net/images/fleet.png" width="849" height="568">
+<img src="http://substack.net/images/fleet.png" alt="" width="849" height="568">

locale/en/blog/weekly-updates/weekly-update.2016-02-22.md

@@ -9,16 +9,19 @@ layout: blog-post.hbs
 ---
 
 ### Node.js News
+
 Node v4.3.1 (LTS), Node v4.4.0 (RC) and Node v5.7.0 (Current) are released.
 
 ### Node v4.3.1 (LTS), Node v4.4.0 (RC) and Node v5.7.0 (Current) Releases
 
 We have three releases: [Node v4.3.1 (LTS)](https://nodejs.org/en/blog/release/v4.3.1/), [Node v4.4.0 (RC)](https://github.com/nodejs/node/pull/5301) and [Node v5.7.0 (Current)](https://nodejs.org/en/blog/release/v5.7.0/). Complete changelog from previous releases can be found [on GitHub](https://github.com/nodejs/node/blob/master/CHANGELOG.md).
 
 ### New official Node.js logo
+
 As a result of an iteration on the official logo, we are proud to introduce and unveil our new logo
 
-<img src="https://cloud.githubusercontent.com/assets/43438/13207731/d7c62f3e-d94c-11e5-8ff8-f32c74b13cc3.png" width="200">
+<img src="https://cloud.githubusercontent.com/assets/43438/13207731/d7c62f3e-d94c-11e5-8ff8-f32c74b13cc3.png" alt="Node.js Logo" width="200">
+
 ### Upcoming Events
 
 * [NodeConf Adventure 2016](https://ti.to/nodeconf/adventure-2016), "First batch of NodeConf Adventure tickets are up!", June 9th–12th, 2016 - Walker Creek Ranch, Marin, CA, USA