add swagger config

cmd/cake_crm/main.go

@@ -11,14 +11,11 @@ import (
 	"log"
 	"net"
 	"net/http"
+	"os"
 )
 
 func main() {
-	//ctx, cancel := context.WithCancel(context.Background())
-	//defer cancel()
-
 	storage := storage_file.NewStorageFile()
-	_ = storage
 
 	// Create a listener on TCP port
 	lis, err := net.Listen("tcp", ":8080")
@@ -46,16 +43,28 @@ func main() {
 		log.Fatalln("Failed to dial server:", err)
 	}
 
-	gwmux := runtime.NewServeMux()
+	mux := runtime.NewServeMux()
 	// Register Greeter
-	err = proto.RegisterCRMHandler(context.Background(), gwmux, conn)
+	err = proto.RegisterCRMHandler(context.Background(), mux, conn)
 	if err != nil {
 		log.Fatalln("Failed to register gateway:", err)
 	}
 
+	err = mux.HandlePath("GET", "/swagger", func(w http.ResponseWriter, r *http.Request, pathParams map[string]string) {
+		data, err := os.ReadFile("resources/main.swagger.json")
+		if err != nil {
+			w.WriteHeader(http.StatusInternalServerError)
+		}
+		_, _ = w.Write(data)
+	})
+	if err != nil {
+		panic(err)
+	}
+	log.Println("Serving swagger json on http://0.0.0.0:8090/swagger")
+
 	gwServer := &http.Server{
 		Addr:    ":8090",
-		Handler: gwmux,
+		Handler: mux,
 	}
 
 	log.Println("Serving gRPC-Gateway on http://0.0.0.0:8090")