docs: add a section in the README for CodeSandbox examples (react-boo…

…tstrap#3914)

* Add a section in the README for CodeSandbox examples

* Add link to automatically use examples repository as workspace on CodeSandbox

* Update the issue template with the link to use React-Bootstrap's CodeSandbox Examples repository as a workspace

.github/ISSUE_TEMPLATE/bug_report.md

@@ -22,7 +22,7 @@ Steps to reproduce the behavior:
 
 ## Reproducable Example
 
-Minimal example by using [CodeSandbox](https://codesandbox.io).
+Minimal example by using [CodeSandbox](https://codesandbox.io/s/github/react-bootstrap/code-sandbox-examples/tree/master/basic).
 
 ## Expected behavior
 

README.md

@@ -1,4 +1,4 @@
-# React-Bootstrap 
+# React-Bootstrap
 
 [![Travis CI Build status][travis-badge]][travis-link]
 [![Appveyor Build status][appveyor-badge]][appveyor-link]
@@ -37,6 +37,12 @@ From there you can:
 - Start a local copy of the docs site with `yarn start`
 - Or build a local copy of the library with `yarn run build`
 
+## CodeSandbox Examples
+
+[Click here](https://github.com/react-bootstrap/code-sandbox-examples) to explore some React-Bootstrap [CodeSandbox](https://codesandbox.io/) examples.
+
+[Click here](https://codesandbox.io/s/github/react-bootstrap/code-sandbox-examples/tree/master/basic) to automatically open [CodeSandbox](https://codesandbox.io/) with the React-Bootstrap [CodeSandbox Examples GitHub Repository](https://github.com/react-bootstrap/code-sandbox-examples) as a workspace.
+
 ## Contributions
 
 Yes please! See the [contributing guidelines][contributing] for details.