[docs] Add Ruby to Languages & frameworks (#388)

src/docs/julia-in-gitpod.md

@@ -6,6 +6,6 @@ It's relatively easy to set up your Julia project in Gitpod.
 
 A great minimal example of a ready-to-code Julia development environment is [JesterOrNot/Gitpod-Julia](https://github.com/JesterOrNot/Gitpod-Julia).
 
-To showcase a real-world Julia project in Gitpod we gitpodified the Julia Programming Language in Gitpod. Try it here:
+To showcase a real-world Julia project in Gitpod, we've gitpodified the Julia Programming Language repository itself! Try it here:
 
 [![JesterOrNot/Julia](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/#https://github.com/JesterOrNot/Julia)

src/docs/languages-and-frameworks.md

@@ -6,3 +6,4 @@ Below is a list of language and framework specific tips & tricks.
   * [Python](/docs/python-in-gitpod/)
   * [Julia](/docs/julia-in-gitpod/)
   * [Go](/docs/go-in-gitpod/)
+  * [Ruby](/docs/ruby-in-gitpod)

src/docs/menu.ts

@@ -129,6 +129,10 @@ export const MENU: MenuEntry[] = [
             M(
                 "Go",
                 "go-in-gitpod"
+            ),
+            M(
+                "Ruby",
+                "ruby-in-gitpod"
             )
         ]
     ),

src/docs/ruby-in-gitpod.md

@@ -0,0 +1,37 @@
+# Ruby in Gitpod
+
+It's relatively easy to set up your Ruby project in Gitpod.
+
+## Ruby Versions
+Gitpod comes with Ruby 2.5 and 2.6 pre-installed (2.6 is the default).
+
+To change the default Ruby version, you can simply run `rvm use 2.5 --default` in Gitpod's Terminal. You can also install other versions, e.g. by running `rvm install 2.7`.
+
+## Examples
+Before we begin, here are some example Ruby projects that are automated with Gitpod:
+
+Repository | Description | Try it
+---------|----------|---------
+ [dev.to](https://github.com/thepracticaldev/dev.to) | A platform where software developers write articles | [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/#https://github.com/thepracticaldev/dev.to)
+ [home-assistant.io](https://github.com/home-assistant/home-assistant.io) | Open source home automation | [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/#https://github.com/home-assistant/home-assistant.io)
+
+## VSCode Extensions
+
+Here are a few useful extensions that you'll likely want to install in your Ruby project.
+
+### [Ruby Test Explorer](https://marketplace.visualstudio.com/items?itemName=connorshea.vscode-ruby-test-adapter)
+With the Ruby test explorer, you can run unit tests from within the Gitpod UI.
+![](./images/ruby_test_ui.png)
+To add this extension to your repository, simply add these lines to your [`.gitpod.yml`](https://www.gitpod.io/docs/config-gitpod-file/) configuration file:
+```YAML
+vscode:
+  extensions:
+    - [email protected]:HO9rpcRv7bmRIuo7Mty/zg==
+    - [email protected]:koqDUMWDPJzELp/hdS/lWw==
+```
+
+## Ruby On Rails
+
+So, you want to write your cool new Ruby On Rails application in Gitpod? Well, here is an idea of how to do it. Please take a look at our minimal Rails example running in Gitpod:
+
+[![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/#https://github.com/JesterOrNot/Gitpod-Ruby-On-Rails)