feat(api): allow multiple oci configs in case multiple images use different registries

Author: mac641

api/api.go

@@ -13,8 +13,8 @@ type MetalConfig struct {
 	NTPServers  []string `json:"ntp_servers,omitempty"`
 	Partition   string   `json:"partition"`
 	// Logging contains logging configurations passed to metal-hammer
-	Logging   *Logging   `json:"logging,omitempty"`
-	OciConfig *OciConfig `json:"oci_config,omitempty"`
+	Logging   *Logging     `json:"logging,omitempty"`
+	OciConfig []*OciConfig `json:"oci_config,omitempty"`
 }
 
 type Logging struct {