refactor: update registry type from 'docker-hub' to 'oci' across seed data (#325)

Updates the registry type for all Docker Hub packages in the seed data
from `docker-hub` to `oci` to align with the standardized OCI registry
format. This change affects the `registry_type` field and simplifies the
`identifier` field by removing the full Docker Hub URL prefix.

Changes:
- Updated `registry_type` from `docker-hub` to `oci` for all Docker
packages
- Simplified `identifier` field to use just the repository name/path
instead of full URLs
- Maintained `registry_base_url` as `https://docker.io` for all entries

This refactoring improves consistency and aligns with OCI standards
while maintaining backward compatibility through the registry base URL.

cmd/publisher/commands/init.go

@@ -15,9 +15,9 @@ import (
 )
 
 const (
-	RegistryTypeNPM    = "npm"
-	RegistryTypePyPi   = "pypi"
-	RegistryTypeDocker = "docker"
+	RegistryTypeNPM  = "npm"
+	RegistryTypePyPi = "pypi"
+	RegistryTypeOci  = "oci"
 )
 
 func InitCommand() error {
@@ -206,7 +206,7 @@ func detectPackageType() string {
 
 	// Check for Dockerfile
 	if _, err := os.Stat("Dockerfile"); err == nil {
-		return RegistryTypeDocker
+		return RegistryTypeOci
 	}
 
 	// Default to npm as most common
@@ -281,8 +281,8 @@ func createServerJSON(
 	case RegistryTypePyPi:
 		registryType = RegistryTypePyPi
 		registryBaseURL = "https://pypi.org"
-	case RegistryTypeDocker:
-		registryType = "docker-hub"
+	case RegistryTypeOci:
+		registryType = RegistryTypeOci
 		registryBaseURL = "https://docker.io"
 	case "url":
 		registryType = "url"