[docs] Add Bash to 'Languages & Frameworks' section

src/docs/bash_in_gitpod.md

@@ -0,0 +1,36 @@
+# Bash
+Bash is pre-installed as the default shell in the main Gitpod workspace-image, however, there isn't much support for shell scripting out-of-the-box.
+
+## Workspace Config
+
+### VSCode Extensions
+
+#### Linting
+
+##### ShellCheck
+
+To use ShellCheck in Gitpod, first, we must install it. Here is a Dockerfile to get you started.
+```dockerfile
+FROM gitpod/workspace-full
+
+USER gitpod
+
+RUN sudo apt-get -q update && \
+    sudo apt-get install -yq shellcheck && \
+    sudo rm -rf /var/lib/apt/lists/*
+```
+Here is a .gitpod.yml with the shellcheck VSCode Extension already installed.
+```yaml
+image:
+  file: .gitpod.Dockerfile
+
+vscode:
+  extensions:
+    - [email protected]:hsU/Rd39aqPYowTqL+DbXg==
+```
+Not sure about ShellCheck? Try it in Gitpod!
+
+[![JesterOrNot/Gitpod-ShellCheck](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/#https://github.com/JesterOrNot/Gitpod-ShellCheck)
+
+## External Resources
+* For more on ShellCheck see https://shellcheck.net

src/docs/languages_and_frameworks.md

@@ -4,3 +4,4 @@ Below is a list of language and framework specific tips & tricks.
 
   * [Java](/docs/java_in_gitpod/)
   * [Python](/docs/python_in_gitpod/)
+  * [Bash](/docs/bash_in_gitpod/)

src/docs/menu.ts

@@ -125,6 +125,10 @@ export const MENU: MenuEntry[] = [
             M(
                 "Julia",
                 "julia_in_gitpod"
+            ),
+            M(
+                "Bash",
+                "bash_in_gitpod"
             )
         ]
     ),