Revert /resource/{id}/versions api

With Hub v1.7.0 release we removed all the preview api's,
but in order to support backward compatibility reverting
`/resource/{id}/verions` api

Signed-off-by: Puneet Punamiya <[email protected]>

api/cmd/api/main.go

@@ -41,6 +41,7 @@ import (
 	catalogsvc "github.com/tektoncd/hub/api/pkg/service/catalog"
 	categorysvc "github.com/tektoncd/hub/api/pkg/service/category"
 	ratingsvc "github.com/tektoncd/hub/api/pkg/service/rating"
+	resourcesvc "github.com/tektoncd/hub/api/pkg/service/resource"
 	statussvc "github.com/tektoncd/hub/api/pkg/service/status"
 	userSvc "github.com/tektoncd/hub/api/pkg/user"
 	v1catalog "github.com/tektoncd/hub/api/v1/gen/catalog"
@@ -100,6 +101,7 @@ func main() {
 		v1catalogSvc = v1catalogsvc.New(api)
 		categorySvc = categorysvc.New(api)
 		ratingSvc = ratingsvc.New(api)
+		resourceSvc = resourcesvc.New(api)
 		v1resourceSvc = v1resourcesvc.New(api)
 		statusSvc = statussvc.New(api)
 	}

api/design/resource.go

@@ -24,6 +24,9 @@ import (
 var _ = Service("resource", func() {
 	Description("The resource service provides details about all kind of resources")
 
+	Error("internal-error", ErrorResult, "Internal Server Error")
+	Error("not-found", ErrorResult, "Resource Not Found Error")
+
 	Method("List", func() {
 		Description("List all resources sorted by rating and name")
 		Result(types.Resources)
@@ -34,4 +37,23 @@ var _ = Service("resource", func() {
 		})
 	})
 
+	Method("VersionsByID", func() {
+		Description("Find all versions of a resource by its id")
+		Payload(func() {
+			Attribute("id", UInt, "ID of a resource", func() {
+				Example("id", 1)
+			})
+			Required("id")
+		})
+		Result(types.ResourceVersions)
+
+		HTTP(func() {
+			GET("/resource/{id}/versions")
+
+			Response(StatusOK)
+			Response("internal-error", StatusInternalServerError)
+			Response("not-found", StatusNotFound)
+		})
+	})
+
 })