[DOCS] Adds Connecting section to Node.JS docs (#1342)

docs/installation.asciidoc

@@ -18,4 +18,41 @@ npm install @elastic/elasticsearch@<major>
 ----
 
 To learn more about the supported major versions, please refer to the 
-<<js-compatibility-matrix>>.
+<<js-compatibility-matrix>>.
+
+
+[discrete]
+[[js-compatibility-matrix]]
+=== Compatibility matrix
+
+The minimum supported version of Node.js is `v8`.
+
+The library is compatible with all {es} versions since 5.x. We recommend you to
+use the same major version of the client as the {es} instance that you are
+using.
+
+[%header,cols=2*]
+|===
+|{es} Version
+|Client Version
+
+|`master`
+|`master`
+
+|`7.x`
+|`7.x`
+
+|`6.x`
+|`6.x`
+
+|`5.x`
+|`5.x`
+|===
+
+
+[discrete]
+==== Browser
+
+WARNING: There is no official support for the browser environment. It exposes
+your {es} instance to everyone, which could lead to security issues. We
+recommend you to write a lightweight proxy that uses this client instead.