docs(website): replace svg by gif (too heavy stuff)

docs/docker.md

@@ -15,7 +15,7 @@ To pull the latest pre-built [docker image](https://hub.docker.com/r/verdaccio/v
 docker pull verdaccio/verdaccio
 ```
 
-![Docker pull](/svg/docker_verdaccio.svg)
+![Docker pull](/svg/docker_verdaccio.gif)
 
 ## Tagged Versions
 

docs/install.md

@@ -28,7 +28,7 @@ or using `yarn`
 yarn global add verdaccio
 ```
 
-![install verdaccio](/svg/install_verdaccio.svg)
+![install verdaccio](/svg/install_verdaccio.gif)
 
 ### Beta
 

docs/what-is-verdaccio.md

@@ -15,13 +15,13 @@ Verdaccio is a **lightweight private npm proxy registry** built in **Node.js**
 $> verdaccio
 ```
 
-![registry](/svg/verdaccio_server.svg)
+![registry](/svg/verdaccio_server.gif)
 
 ## Using Verdaccio
 
 Using verdaccio with any node package manager client is quite straightforward.
 
-![registry](/svg/npm_install.svg)
+![registry](/svg/npm_install.gif)
 
 You can use a custom registry either setting globally for all your projects