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

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

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+# `diffAssoc()`
+
+The diffAssoc method compares the collection against another collection or a plain object based on its keys and values.
+This method will return the key / value pairs in the original collection that are not present in the given collection:
+
+```js
+const collection = collect({
+  color: 'orange',
+  type: 'fruit',
+  remain: 6,
+});
+
+const diff = collection.diffAssoc({
+  color: 'yellow',
+  type: 'fruit',
+  remain: 3,
+  used: 6,
+});
+
+diff.all();
+
+// { color: 'orange', remain: 6 };
+```
+
+[View source on GitHub](https://github.com/ecrmnn/collect.js/blob/master/src/methods/diffAssoc.js)