#17 add dockerfile for api

api/src/utils/http-utils.go

@@ -0,0 +1,11 @@
+package utils
+
+import (
+	"encoding/json"
+	"net/http"
+)
+
+func WriteJSON(w http.ResponseWriter, data interface{}) error {
+	w.Header().Set("Content-Type", "application/json")
+	return json.NewEncoder(w).Encode(data)
+}