add env and user to inspect in dockercompat

[Shubhranshu153]

Issue:
Docker Compat Inspect doesn't have Env and User parameter for the process

Description:
This PR adds Env and User for the docker compat inspect

Test:

1. Before adding the Env

   "Config": {
            "Hostname": "8ef7e6dbae24",
            "AttachStdin": false,
            "Labels": {
                "dev.containers.id": "base-alpine",
                "dev.containers.release": "v0.4.10",
}

2. After adding the Env:

    "Config": {
      "Hostname": "08826b4795c7",
      "AttachStdin": false,
      "Env": [
        "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
        "HOSTNAME=08826b4795c7"
      ],
  "Labels": {
        "dev.containers.id": "base-alpine",
        "dev.containers.release": "v0.4.10",

}

---

1. Before adding the User

   "Config": {
            "Hostname": "8ef7e6dbae24",
            "AttachStdin": false,
            "Labels": {
                "dev.containers.id": "base-alpine",
                "dev.containers.release": "v0.4.10",
}

2. After adding the User

 "Config": {
            "Hostname": "5dceef466aa1",
            "User": "test",
            "AttachStdin": false,
            "Env": [
                "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
                "HOSTNAME=5dceef466aa1"
            ],
            "Labels": {
                "devcontainer.config_file": "/Users/shubhum/Documents/devcontainers/.devcontainer/devcontainer.json",
                "devcontainer.local_folder": "/Users/shubhum/Documents/devcontainers",
                }

[AkihiroSuda]

Thanks

[AkihiroSuda]

CI is failing

[Shubhranshu153]

Docker and nerdctl handle create calls with --user differently.
Docker throws error during the run phase:

shubhum@147ddaa42911 nerdctl % docker create --name test --user test alpine
0fef3f3ffb87fc20b282a6bba0f20b5d2ece1e42f495777f5c67581c1a65725c
shubhum@147ddaa42911 nerdctl %  docker start 0f  
Error response from daemon: unable to find user test: no matching entries in passwd file
Error: failed to start containers: 0f
shubhum@147ddaa42911 nerdctl % 

nerdctl on the other hand fails during the create call

[shubhum@lima-finch nerdctl]$ sudo nerdctl create --name test --user test alpine
FATA[0000] mount callback failed on /tmp/containerd-mount2785573027: no users found 

[Shubhranshu153]

@apostasie do you happen to know this error. i am wondering if it is a race condiiton

 timed out to access cache storage. other debug session is running?

[apostasie]

@apostasie do you happen to know this error. i am wondering if it is a race condiiton

 timed out to access cache storage. other debug session is running?

Never seen this. This is buildg territory, right? So, @ktock might have an idea.

Let me look more closely at your changeset though.

[apostasie]

Coming from https://github.com/ktock/buildg/blob/main/pkg/buildkit/client.go#L83 - so, definitely buildg.

Not sure why or when that would happen, but having looked at your changeset, I do not think this is related and probably is some network fluke.

[AkihiroSuda]

Needs rebase