Make sure that you have Node.js version 18 (or later) installed on your system. If you do not have Node.js installed we recommend using [Node Version Manager](https://github.com/nvm-sh/nvm) to install it.
In order to run the Keycloak server you will also have to install the Java Development Kit (JDK). We recommend that you use the same version of the JDK as [required by the Keycloak server](https://github.com/keycloak/keycloak/blob/main/docs/building.md#building-from-source).
This will download the [Nightly version](https://github.com/keycloak/keycloak/releases/tag/nightly) of the Keycloak server and run it locally on port `8180`. If a previously downloaded version was found in the `server/` directory then that one will be used instead. If you want to download the latest Nightly version you can remove the server directory before running the command to start the server.
In order for the development version of the Admin UI to work you will have to import a custom client to the Keycloak server. This is only required during development as the development server for the Admin UI runs on a different port (more on that later).
Wait for the Keycloak server to be up and running and run the following command in a new terminal:
```bash
npm run server:import-client
```
You'll only have to run this command once, unless you remove the server directory or Keycloak server data.
### Running the development server
Now that the Keycloak sever is running it's time to run the development server for the Admin UI. This server is used to build the Admin UI in a manner that it can be iterated on quickly in a browser, using features such as [Hot Module Replacement (HMR) and Fast Refresh](https://www.snowpack.dev/concepts/hot-module-replacement).
To start the development server run the following command:
```bash
npm run start
```
Once the process of optimization is done your browser will automatically open your local host on port `8080`. From here you will be redirected to the Keycloak server to authenticate, which you can do with the default username and password (`admin`).
You can now start making changes to the source code, and they will be reflected in your browser.
If you want to build the application using Maven and produce a JAR that can be installed directly into Keycloak, check out the [Keycloak theme documentation](./keycloak-theme/README.md).
## Linting
Every time you create a commit it should be automatically linted and formatted for you. It is also possible to trigger the linting manually:
It's possible to theme the Admin UI interface, this is useful if you want to apply your own branding so that the product looks familiar to your users. The Admin UI comes with two built-in themes called `keycloak` and `rh-sso`, by default the `keycloak` theme will be used when building the application.
This behavior can be changed by passing in a `THEME_NAME` environment variable, for example if wanted to build the application using the `rh-sso` theme we can do the following:
All themes are located in the `themes/` directory of the project, if you want to create a new theme you can create a new directory here and name it the same as your theme. Copy the files from the default theme here and customize them to your liking.
You can find information about the project structure in the [official Cypress documentation](https://docs.cypress.io/guides/core-concepts/writing-and-organizing-tests#Folder-structure).
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