[docs]: add JavaScript in Gitpod guide.

src/docs/languages-and-frameworks.md

@@ -2,6 +2,7 @@
 
 Below is a list of language and framework specific tips & tricks.
 
+- [JavaScript](/docs/languages/javascript/)
 - [Python](/docs/languages/python/)
 - [HTML/CSS](/docs/languages/html/)
 - [Java](/docs/languages/java/)

src/docs/languages/javascript.md

@@ -0,0 +1,77 @@
+# JavaScript in Gitpod
+
+Gitpod comes with great built-in support for JavaScript, TypeScript, and tools like Node.js, npm, and Yarn pre-installed. Still, depending on your project, you might want to further optimize the experience.
+
+## Examples
+
+Here are a few JavaScript example projects that are automated with Gitpod:
+
+<div class="table-container">
+
+| Repository                                             | Description                                                                 | Try it                                                                                                                      |
+| ------------------------------------------------------ | --------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------- |
+| [MobX](https://github.com/mobxjs/mobx)                 | Simple, scalable state management.                                          | [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/#https://github.com/mobxjs/mobx)         |
+| [Mozilla pdf.js](https://github.com/mozilla/pdf.js)    | PDF.js is a Portable Document Format (PDF) viewer that is built with HTML5. | [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/#https://github.com/mozilla/pdf.js)      |
+| [Tesseract.js](https://github.com/naptha/tesseract.js) | Pure Javascript OCR for more than 100 Languages.                            | [![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/#https://github.com/naptha/tesseract.js) |
+
+</div>
+
+## Start tasks
+
+Many JavaScript projects these days use some sort of build tool for things like bundling, linting, code-splitting and so on and they also use a package manager, typically either npm or Yarn for managing dependencies.
+
+You can automate the process of installing dependencies and starting any tasks like `build`, `lint`, `test` and so on at the workspace startup, for doing so please create a [.gitpod.yml](/docs/config-gitpod-file/) file in the root of your project and add the tasks you want to be automated. An example might look like this:
+
+```yaml
+tasks:
+  - init: npm install && npm run build
+    command: npm run dev
+```
+
+<span aria-hidden="true">👆</span> In the above example, we are telling Gitpod to run what is in the `init` phase at the time of workspace initialization and then afterwards run whatever is in the `command` phase.
+
+You can read more about start tasks [here](/docs/config-start-tasks/).
+
+## Node Versions
+
+Gitpod comes with the latest stable Node.js version pre-installed but let's say your project uses a different version of `node` (say 8 for example), well the good news is that Gitpod also comes with `nvm` (a tool used to manage multiple active Node.js versions) installed. To install and configure the desired version of node create a [.gitpod.Dockerfile](/docs/config-docker/) and add the following to it:
+
+```dockerfile
+FROM gitpod/workspace-full:latest
+
+RUN bash -c ". .nvm/nvm.sh \
+    && nvm install 8 \
+    && nvm use 8 \
+    && nvm alias default 8"
+
+RUN echo "nvm use default &>/dev/null" >> ~/.bashrc.d/51-nvm-fix
+```
+
+and then in your [.gitpod.yml](/docs/config-gitpod-file/) reference your [.gitpod.Dockerfile](/docs/config-docker/) as shown below:
+
+```yaml
+image:
+  file: .gitpod.Dockerfile
+```
+
+Then, after committing your changes, start a new workspace, the version for that workspace will be what you’ve specified in your [.gitpod.Dockerfile](/docs/config-docker/).
+
+## Using Eslint for linting
+
+If your project's `package.json` does not mention Eslint as a dependency then you have to install it first. For installing it add the following to the end of the `init` phase of your [.gitpod.yml](/docs/config-gitpod-file/) as shown:
+
+```yaml
+tasks:
+  - init: npm install && npm run build && npm install -g eslint
+```
+
+and then search for `eslint` in the extensions tab and then install it from there using the install button as shown in the screenshot.
+
+![Install Eslint in Gitpod](../images/eslint-extension.png)
+
+## Further Reading
+
+- [Sustainable Node.js development with only a browser](/blog/node-js-development/).
+- [Developing a Nuxt.js app entirely in your browser](/blog/developing-nuxtjs-in-browser/)
+- [Gitpodifying — The Ultimate Guide](/blog/gitpodify/)
+- [Debugging Node.js applications in Theia](/blog/node-js-gitpod/)

src/docs/menu.ts

@@ -92,7 +92,11 @@ export const MENU: MenuEntry[] = [
     M(
         "Languages & Frameworks",
         "languages-and-frameworks",
-        [
+        [   
+            M(
+                "JavaScript",
+                "languages/javascript"
+            ),
             M(
                 "Python",
                 "languages/python"