docs: update GA status

README.md

@@ -13,20 +13,34 @@ integrations.
 - Define your data and endpoints with OpenAPI
 - No maintenance of generated code
 
-## Status: Developer Preview #3
+## Status: General Availability
 
-LoopBack 4 is a work in progress, the public API is frequently changed in
-backward incompatible ways. See
-[Upcoming-Releases on wiki](https://github.com/strongloop/loopback-next/wiki/Upcoming-Releases)
-for more details.
+LoopBack 4 GA (General Availability) has been released in October 2018, read
+more in [the announcement post](http://strongloop.com/strongblog/loopback-4-ga).
+
+The documentation website is https://loopback.io/doc/en/lb4/.
 
 Learn about the latest and greatest
 [features and technologies in LoopBack 4](https://loopback.io/doc/en/lb4/Crafting-LoopBack-4.html)
 by using it for your next project. Start by having a look at
 [Getting Started](https://loopback.io/doc/en/lb4/Getting-started.html).
 
-**NOTE:** _It is not recommended for production use yet._ For production, use
-[LoopBack 3](https://loopback.io/doc/en/lb3/index.html).
+Check the
+[API documentation](http://apidocs.loopback.io/@loopback%2fdocs/apidocs.html)
+for all the API usages in each package.
+
+[LoopBack 3](https://loopback.io/doc/en/lb3/) became active LTS version, and
+[LoopBack 2](https://loopback.io/doc/en/lb2/) became maintenance LTS version.
+
+| Version    | Status          | Published | EOL                  |
+| ---------- | --------------- | --------- | -------------------- |
+| LoopBack 4 | Current         | Oct 2018  | Apr 2021 _(minimum)_ |
+| Loopback 3 | Active LTS      | Dec 2016  | Dec 2019             |
+| Loopback 2 | Maintenance LTS | Jul 2014  | Apr 2019             |
+
+Please refer to our
+[Long Term Support Policy](https://loopback.io/doc/en/contrib/Long-term-support.html)
+for more details.
 
 ## Installation