Add documentation and tests

.gitignore

@@ -342,4 +342,7 @@ $RECYCLE.BIN/
 # Windows shortcuts
 *.lnk
 
-# End of https://www.gitignore.io/api/go,vim,git,macos,linux,emacs,windows,eclipse,intellij+all,visualstudiocode
+# End of https://www.gitignore.io/api/go,vim,git,macos,linux,emacs,windows,eclipse,intellij+all,visualstudiocode
+
+# UI node-modules
+node_modules

pkg/assets/static/redirectpage/README.adoc

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+
+The redirectPage.js implements the redirect flow of pages from sandbox developer catalog.
+
+== Test
+
+1. In the assets static folder install node_modules by running 
+    ```
+    npm i
+    ```
+2. To run tests, execute
+    ```
+    npm run test
+    ``` 
+
+== Implementation guidelines
+
+1. When user clicks on a catalog item on developers.redhat.com it redirects to this url format
+    `${baseUrl}?link="catalogName"&keyword="keyword"&selectedId="selectedId"`
+2. If the user is not authenticated, it redirects to sso page for user to login
+3. Once the user is authenticated it redirects to the page user wants to access which is in the format
+    `${consoleUrl}/${link}/ns/${defaultUserNamespace}?keyword="keyword"&selectedId="selectedId"` with
+    most of the info coming from `api/v1/signup` and the original url
+
+The below are exceptions to above mentioned redirect Url's format
+    For `Jupyter Notebooks` the url format is `${consoleUrl}/notebookController/spawner`
+    For `Red Hat Openshift DevSpaces` the url format is `${consoleUrl}/dashboard/`
+

pkg/assets/static/redirectpage/babel.config.js

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+module.exports = {
+    presets: ['@babel/preset-env'],
+};

pkg/assets/static/redirectpage/jest.config.js

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+module.exports = {
+    testEnvironment: "jsdom",
+    transform: {
+        '^.+\\.jsx?$': 'babel-jest',
+      },
+}