feat: expose config on start

cmd/tank/config.go

@@ -103,5 +103,12 @@ func ReadConfig(configfile string) (conf *Config, err error) {
 	}
 	conf.ExpandEnv()
 	infoLog.Printf("successfully read config file (%s)", configfile)
+
+	if out, err := yaml.Marshal(conf); err != nil {
+		dbgLog.Printf("error marshalling the config:  %s", err.Error())
+	} else {
+		dbgLog.Printf("Config:\n%s", string(out))
+	}
+
 	return
 }