Remove unnecessary leading spaces in shell commands (#346)

Author: Knocklive

getting-started/installation.md

@@ -29,31 +29,31 @@ the install specific instructions below
 3. Clone the repository:
 
 ```shell
-   git clone https://github.com/MagicMirrorOrg/MagicMirror
+git clone https://github.com/MagicMirrorOrg/MagicMirror.git
 ```
 
 4. Enter the repository:
 
 ```shell
-  cd MagicMirror
+cd MagicMirror
 ```
 
 5. Install the application: ``
 
 ```shell
-  node --run install-mm
+node --run install-mm
 ```
 
 6. Make a copy of the config sample file:
 
 ```shell
-   cp config/config.js.sample config/config.js
+cp config/config.js.sample config/config.js
 ```
 
 7. Start the application:
 
 ```shell
-  node --run start
+node --run start
 ```
 
 ::: warning NOTE