[CORL-584] Add Version 5 Documentation (#2523)

* feat: initial version

* fix: adjusted height

* fix: tweaked sidebar styles again

* fix: adjusted overflow property

* fix: reverted overflow, cleaned sidebar

docs/source/version-5-development.md

@@ -0,0 +1,103 @@
+---
+title: Developing
+permalink: /v5/developing/
+---
+
+Running Coral for development is very similar to installing Coral via Source as
+described above.
+
+Coral requires NodeJS >=10, we recommend using `nvm` to help manage node
+versions: https://github.com/creationix/nvm.
+
+```bash
+# Clone and cd into the Coral directory.
+git clone https://github.com/coralproject/talk.git
+cd talk
+
+# Install dependencies.
+npm install
+```
+
+Running Coral with default settings assumes that you have:
+
+- MongoDB >=3.6 running on `127.0.0.1:27017`
+- Redis >=3.2 running on `127.0.0.1:6379`
+
+If you don't already have these databases running, you can execute the following
+assuming you have Docker installed on your local machine:
+
+```bash
+docker run -d -p 27017:27017 --restart always --name mongo mongo:3.6
+docker run -d -p 6379:6379 --restart always --name redis redis:3.2
+```
+
+We recommend installing [watchman](https://facebook.github.io/watchman/docs/install.html) for better watch
+performance.
+
+```bash
+# On macOS, you can run the following with Homebrew.
+brew update
+brew install watchman
+```
+
+Then start Coral with:
+
+```bash
+# Run the server in development mode in order to facilitate auto-restarting and
+# rebuilding when file changes are detected. This might take a while to fully run.
+npm run watch
+```
+
+When the client code has been built, navigate to http://localhost:8080/install
+to start the installation wizard. **Note: Ensure `localhost:8080` is used in the permitted domains list.**
+
+To see the comment stream goto http://localhost:8080/.
+
+To run linting and tests use the following commands:
+
+```bash
+# Run the linters.
+npm run lint
+
+# Run our unit and integration tests.
+npm run test
+```
+
+## Email
+
+To test out the email sending functionality, you can run [inbucket](https://www.inbucket.org/)
+which provides a test SMTP server that can visualize emails in the browser:
+
+```bash
+docker run -d --name inbucket --restart always -p 2500:2500 -p 9000:9000 inbucket/inbucket
+```
+
+You can then configure the email server on Coral
+by setting the email settings in
+`Configure -> Email` in the admin:
+
+| Field          | Value                |
+| -------------- | -------------------- |
+| From Address   | `community@test.com` |
+| Secure         | `No`                 |
+| Host           | `localhost`          |
+| Port           | `2500`               |
+| Authentication | `No`                 |
+
+Navigate to http://localhost:9000, click the "Monitor" tab. New emails received
+on this screen.
+
+## Design Language System (UI Components)
+
+We use [docz](https://docz.site) to document and develop our Design Language System. To start docz run:
+
+```bash
+# Make sure CSS types are generated.
+# This is not required when `npm run watch` is already running.
+npm run generate:css-types
+
+# Run docz in development.
+npm run docz -- dev
+```
+
+After compilation has finished you can access docz at http://localhost:3030/.