[DX] Ignore var directory (#483)

| Q               | A
| --------------- | -----
| Branch?         | 2.0
| Bug fix?        | no
| New feature?    | no
| Related tickets | -

Reorganized to group common directories at the top for better
readability. Moved , , , and to the beginning of the file.

Author: GSadee

.gitignore

@@ -1,10 +1,11 @@
+/composer.lock
+/node_modules/
+/var/
+/vendor/
+
 /bin/*
 !/bin/.gitkeep
 
-/vendor/
-/node_modules/
-/composer.lock
-
 /etc/build/*
 !/etc/build/.gitkeep