---
asIndexPage: true
---

import { Steps, Callout, Cards } from "nextra/components";
import {
  IconPaint,
  IconLockOpen,
  IconKey,
  IconPlug,
  IconServer
} from "@tabler/icons-react";

# Configuration

## Custom docker socket

Sometimes, there may be a need to specify a custom docker socket. Cup provides the `-s` option for this.

For example, if using Podman, you might do

```bash
$ cup -s /run/user/1000/podman/podman.sock check
```

This option is also available in the configuration file and it's best to put it there.

<Cards.Card
  icon={<IconPlug />}
  title="Custom Docker socket"
  href="/docs/configuration/socket"
/>

## Configuration file

Cup has an option to be configured from a configuration file named `cup.json`.

<Steps>
### Create the configuration file
Create a `cup.json` file somewhere on your system. For binary installs, a path like `~/.config/cup.json` is recommended.
If you're running with Docker, you can create a `cup.json` in the directory you're running Cup and mount it into the container. _In the next section you will need to use the path where you **mounted** the file_

### Configure Cup from the configuration file

Follow the guides below to customize your `cup.json`

<Cards>
  <Cards.Card
    icon={<IconKey />}
    title="Authentication"
    href="/docs/configuration/authentication"
  />
  <Cards.Card
    icon={<IconLockOpen />}
    title="Insecure registries"
    href="/docs/configuration/insecure-registries"
  />
  <Cards.Card
    icon={<IconPaint />}
    title="Theme"
    href="/docs/configuration/theme"
  />
  <Cards.Card
    icon={<IconServer />}
    title="Multiple servers"
    href="/docs/configuration/servers"
  />
</Cards>

Here's a full example:

```json
{
  "authentication": {
    "ghcr.io": "<YOUR_TOKEN_HERE>",
    "registry-1.docker.io": "<YOUR_TOKEN_HERE>"
  },
  "theme": "blue",
  "insecure_registries": ["localhost:5000", "my-insecure-registry.example.com"]
}
```

<Callout>
  If you want autocompletions and error checking for your editor, there is a
  JSON schema available. Use it by adding a `"$schema":
  "https://raw.githubusercontent.com/sergi0g/cup/main/cup.schema.json"` entry in
  your `cup.json` file.
</Callout>

### Run Cup with the new configuration file

To let Cup know that you'd like it to use a custom configuration file, you can use the `-c` flag, followed by the _absolute_ path of the file.

```bash
$ cup -c /home/sergio/.config/cup.json check
```

```bash
$ docker run -tv /var/run/docker.sock:/var/run/docker.sock -v /home/sergio/.config/cup.json:/config/cup.json ghcr.io/sergi0g/cup -c /config/cup.json serve
```

</Steps>
