fix: enable env vars in setup steps (and deprecate admin subcommand) (#3871)

* fix: enable env vars in setup steps (and deprecate admin subcommand)

* fix tests and error text

cmd/start/start_from_init.go

@@ -0,0 +1,49 @@
+package start
+
+import (
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+	"github.com/zitadel/logging"
+
+	"github.com/zitadel/zitadel/cmd/initialise"
+	"github.com/zitadel/zitadel/cmd/key"
+	"github.com/zitadel/zitadel/cmd/setup"
+	"github.com/zitadel/zitadel/cmd/tls"
+)
+
+func NewStartFromInit() *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "start-from-init",
+		Short: "cold starts zitadel",
+		Long: `cold starts ZITADEL.
+First the minimum requirements to start ZITADEL are set up.
+Second the initial events are created.
+Last ZITADEL starts.
+
+Requirements:
+- cockroachdb`,
+		Run: func(cmd *cobra.Command, args []string) {
+			err := tls.ModeFromFlag(cmd)
+			logging.OnError(err).Fatal("invalid tlsMode")
+
+			masterKey, err := key.MasterKey(cmd)
+			logging.OnError(err).Panic("No master key provided")
+
+			initialise.InitAll(initialise.MustNewConfig(viper.GetViper()))
+
+			setupConfig := setup.MustNewConfig(viper.GetViper())
+			setupSteps := setup.MustNewSteps(viper.New())
+			setup.Setup(setupConfig, setupSteps, masterKey)
+
+			startConfig := MustNewConfig(viper.GetViper())
+
+			err = startZitadel(startConfig, masterKey)
+			logging.OnError(err).Fatal("unable to start zitadel")
+		},
+	}
+
+	startFlags(cmd)
+	setup.Flags(cmd)
+
+	return cmd
+}