implement reference grpc server

pkg/demogrpc/fact.go

@@ -0,0 +1,25 @@
+package demogrpc
+
+import (
+	"google.golang.org/protobuf/types/known/timestamppb"
+
+	pb "gitea.libretechconsulting.com/rmcguire/go-http-server-with-otel/api/demo/app/v1alpha1"
+)
+
+type RandomFact struct {
+	ID        string `json:"id,omitempty"`
+	Text      string `json:"text,omitempty"`
+	Source    string `json:"source,omitempty"`
+	SourceURL string `json:"source_url,omitempty"`
+	Language  string `json:"language,omitempty"`
+	Permalink string `json:"permalink,omitempty"`
+}
+
+func (f *RandomFact) FactToProto() *pb.GetDemoResponse {
+	return &pb.GetDemoResponse{
+		Timestamp: timestamppb.Now(),
+		Fact:      f.Text,
+		Source:    f.SourceURL,
+		Language:  f.Language,
+	}
+}