ggcr: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

### What I got

```sh
󰀵  󱑍 14:49  ﱮ encore-nextjs/backend    main !?+27 via 🥟 v1.1.22 via  v20.15.1   8s 
 ➜  docker context ls                
NAME            DESCRIPTION                               DOCKER ENDPOINT                                   ERROR
default *       Current DOCKER_HOST based configuration   unix:///var/run/docker.sock                       
desktop-linux   Docker Desktop                            unix:///home/imbios/.docker/desktop/docker.sock   

󰀵  󱑍 14:49  ﱮ encore-nextjs/backend    main !?+27 via 🥟 v1.1.22 via  v20.15.1 
 ➜  encore eject docker encore-nextjs
2:49PM INF compiling Encore application for linux/amd64
2:49PM INF saving image to local docker daemon
2:49PM ERR unable to save docker image error="error loading image: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?"
```

### What I expect

- Successfully build the docker image. 

### Encore Version

encore version v1.39.5

### Suspected Root Cause

The code that thrown the error:

https://github.com/encoredev/encore/blob/f8b785d73b213e01f25bbef44bccc5928b26d7e5/cli/daemon/export/export.go#L133-L147

Which from:

https://github.com/google/go-containerregistry/blob/b8e87ed57b8042c56cc4875aa99e79906b7b9ad5/pkg/v1/daemon/write.go#L66-L70

Suspected related issues:

- https://github.com/google/go-containerregistry/issues/205
- https://github.com/google/go-containerregistry/issues/552
- https://github.com/google/go-containerregistry/issues/627

Related issues:

- https://github.com/encoredev/encore/issues/1316

### Command

```sh
encore eject docker encore-nextjs
```

### Tried Potential Solution

1. After identifying the selected docker context as `desktop-Linux` and its mismatch with the error given by encore, I switched it to `default`, and the error was still the same.
2. After that, I thought it was similar to https://github.com/encoredev/encore/issues/1309, so I restarted my Ubuntu machine, but the error was still there.

Let me know if there is any other info you need.

	// write the image in docker save format first, then load it
	resp, err := o.client.ImageLoad(o.ctx, pr, false)
	if err != nil {
	return "", fmt.Errorf("error loading image: %w", err)
	}

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ggcr: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running? #1999

ImBIOS
openedon Aug 15, 2024

What I got

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Suspected Root Cause

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Tried Potential Solution

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