always say EOF

Expected Behavior

i tried to slim the ubuntu:20.04 image, and an own image. Both are getting Error EOF

Actual Behavior

`docker run -it --rm -v /var/run/docker.sock:/var/run/docker.sock dslim/slim:1.40.0
app='slim' message='Join the Gitter channel to ask questions or to share your feedback' info='https://gitter.im/docker-slim/community'
app='slim' message='Join the Discord server to ask questions or to share your feedback' info='https://discord.gg/9tDyxYS'
app='slim' message='GitHub Discussions' info='https://github.com/docker-slim/docker-slim/discussions'

build --target ubuntu:20.04 <-- this is the line I inserted in the docker container

app='slim' message='Join the Gitter channel to ask questions or to share your feedback' info='https://gitter.im/docker-slim/community'
app='slim' message='Join the Discord server to ask questions or to share your feedback' info='https://discord.gg/9tDyxYS'
app='slim' message='GitHub Discussions' info='https://github.com/docker-slim/docker-slim/discussions'
cmd=build info=exec message='changing continue-after from probe to nothing because http-probe is disabled'
cmd=build info=exec message='changing continue-after to enter'
cmd=build state=started
cmd=build info=params target='ubuntu:20.04' continue.mode='enter' rt.as.user='true' keep.perms='true' tags='' target.type='image'
cmd=build state=image.inspection.start
cmd=build info=image id='sha256:1c5c8d0b973ab9d6d7742cf050beefa8ba2efb7779e09bfb1200d6192180766e' size.bytes='72785566' size.human='73 MB'
cmd=build info=image.stack index='0' name='ubuntu:20.04' id='sha256:1c5c8d0b973ab9d6d7742cf050beefa8ba2efb7779e09bfb1200d6192180766e'
cmd=build state=image.inspection.done
cmd=build state=container.inspection.start
time="2023-03-28T15:18:04Z" level=error msg="dockerutil.BuildEmptyImage: dockerapi.BuildImage() error = unexpected EOF"
time="2023-03-28T15:18:04Z" level=fatal msg="docker-slim: failure" error="unexpected EOF" stack="goroutine 1 [running]:\nruntime/debug.Stack()\n\truntime/debug/stack.go:24 +0x65\ngithub.com/docker-slim/docker-slim/pkg/util/errutil.FailOn({0x1eaeac0, 0xc00003a140})\n\tgithub.com/docker-slim/docker-slim/pkg/util/errutil/errutil.go:28 +0x5e\ngithub.com/docker-slim/docker-slim/pkg/app/master/inspectors/container.(*Inspector).RunContainer(0xc000114b00)\n\tgithub.com/docker-slim/docker-slim/pkg/app/master/inspectors/container/container_inspector.go:422 +0x694\ngithub.com/docker-slim/docker-slim/pkg/app/master/commands/build.OnCommand(_, , {, _}, , {, }, {, _}, {0x0, ...}, ...)\n\tgithub.com/docker-slim/docker-slim/pkg/app/master/commands/build/handler.go:875 +0x4186\ngithub.com/docker-slim/docker-slim/pkg/app/master/commands/build.glob..func1(0xc00026b280)\n\tgithub.com/docker-slim/docker-slim/pkg/app/master/commands/build/cli.go:640 +0x4bb0\ngithub.com/urfave/cli/v2.(*Command).Run(0x2c82de0, 0xc000496d80)\n\tgithub.com/urfave/cli/v2@v2.3.0/command.go:163 +0x5bb\ngithub.com/urfave/cli/v2.(*App).RunContext(0xc000509520, {0x1ec7d18?, 0xc000042020}, {0xc0002701e0, 0x5, 0x5})\n\tgithub.com/urfave/cli/v2@v2.3.0/app.go:313 +0xb48\ngithub.com/urfave/cli/v2.(*App).Run(...)\n\tgithub.com/urfave/cli/v2@v2.3.0/app.go:224\ngithub.com/docker-slim/docker-slim/pkg/app/master/commands.(*InteractiveApp).execute(0xc000495590, {0xc00068f830?, 0xc00049e030?})\n\tgithub.com/docker-slim/docker-slim/pkg/app/master/commands/cliprompt.go:101 +0x354\ngithub.com/c-bata/go-prompt.(*Prompt).Run(0xc000488900)\n\tgithub.com/c-bata/go-prompt@v0.2.3/prompt.go:85 +0x82d\ngithub.com/docker-slim/docker-slim/pkg/app/master/commands.(*InteractiveApp).Run(...)\n\tgithub.com/docker-slim/docker-slim/pkg/app/master/commands/cliprompt.go:187\ngithub.com/docker-slim/docker-slim/pkg/app/master.newCLI.func4(0xc000496a40?)\n\tgithub.com/docker-slim/docker-slim/pkg/app/master/cli.go:172 +0x50\ngithub.com/urfave/cli/v2.(*App).RunContext(0xc000509520, {0x1ec7d18?, 0xc000042020}, {0xc00003a200, 0x1, 0x1})\n\tgithub.com/urfave/cli/v2@v2.3.0/app.go:322 +0x953\ngithub.com/urfave/cli/v2.(*App).Run(...)\n\tgithub.com/urfave/cli/v2@v2.3.0/app.go:224\ngithub.com/docker-slim/docker-slim/pkg/app/master.Run()\n\tgithub.com/docker-slim/docker-slim/pkg/app/master/app.go:15 +0x46\nmain.main()\n\tgithub.com/docker-slim/docker-slim/cmd/slim/main.go:15 +0x1aa\n" version="linux|Transformer|1.40.0|a4bb798922820523fceedb9121f5bcfdfc9f2901|2023-01-16_01:52:31AM"
`

Steps to Reproduce the Problem

1. use the latest (1.40.0) and dockerizied
2. run docker run -it --rm -v /var/run/docker.sock:/var/run/docker.sock dslim/slim:1.40.0
3. inside docker write build --target ubuntu:20.04
4. See EOF Error

Specifications

• Version: 1.40.0
• Platform: docker

Reproduce the failure with the documented Docker command and target ubuntu:20.04, then trace dockerutil.BuildEmptyImage through pkg/app/master/inspectors/container/container_inspector.go:422 and the Docker API build path shown in the stack trace. Compare the resulting error with the issue title and comments to determine the intended EOF behavior; done means the expected behavior is defined and verified for this reproduction.