implement RunService in global mode and RemoveService

internal/api/service.go

@@ -0,0 +1,25 @@
+package api
+
+const (
+	ServiceModeReplicated = "replicated"
+	ServiceModeGlobal     = "global"
+)
+
+type ServiceSpec struct {
+	Container ContainerSpec
+	// Mode is the replication mode of the service. Default is ServiceModeReplicated if empty.
+	Mode string
+	Name string
+}
+
+type ContainerSpec struct {
+	Command []string
+	Image   string
+	// Run a custom init inside the container. If nil, use the daemon's configured settings.
+	Init *bool
+}
+
+type MachineContainerID struct {
+	MachineID   string
+	ContainerID string
+}