Tweaked gitignore

gitignore removed all composer and npm files, so automated builds would fail

conf/site/node_modules/collect.js/docs/api/skip.md

@@ -0,0 +1,27 @@
+# `skip()`
+
+The skip method returns a new collection, without the first given amount of items:
+
+```js
+const collection = collect([1, 2, 3, 4, 5, 6]);
+
+collection.skip(4).all();
+
+// [5, 6]
+```
+
+```js
+const collection = collect({
+  first: 'first',
+  second: 'second',
+  third: 'third',
+  fourth: 'fourth',
+  fifth: 'fifth',
+});
+
+collection.skip(4).all();
+
+// { fifth: 'fifth' }
+```
+
+[View source on GitHub](https://github.com/ecrmnn/collect.js/blob/master/src/methods/skip.js)