Dockerfile: fix rvps dockerfile

[Xynnn007]

Close confidential-containers/trustee#178

We might cut a v0.8.1 release for RVPS based on this PR.

cc @niteeshkd @mythi @fidencio

[mythi]

LGTM and I also have this fix in use locally

[Xynnn007]

Hi @fidencio Does this look good to you? After merging this, we will cut a release for AS v0.8.1 to trigger CI to build images.

We do not need to cut KBS v0.8.1 as the current KBS image v0.8.0 ghcr.io/confidential-containers/key-broker-service:built-in-as-v0.8.0 can be run normally

root@406ccd20c384:/# kbs --config-file config.toml 
[2023-11-15T05:12:55Z INFO  kbs] Using config file config.toml
[2023-11-15T05:12:55Z WARN  kbs] insecure APIs are enabled
[2023-11-15T05:12:55Z INFO  api_server] Starting HTTP server at [127.0.0.1:8080]
[2023-11-15T05:12:55Z INFO  actix_server::builder] starting 8 workers
[2023-11-15T05:12:55Z INFO  actix_server::server] Tokio runtime found; starting in existing Tokio runtime

Then we will archive AS repo.

cc @fitzthum

[fidencio]

lgtm, thanks @Xynnn007!