Update proto_template.proto

Author: NF-coder

simple_rpc/server/proto_builder/templates/proto_template.proto

@@ -1,6 +1,7 @@
 // AUTOMATICALLY GENERATED BY SimpleRPC
 
 syntax = "proto3";
+package {{ service.name }}_pkg;
 import "google/protobuf/empty.proto";
 
 service {{ service.name }} {
@@ -16,4 +17,4 @@ message {{ message.name }} {
     {{ field.type }} {{ field.name }} = {{ loop.index0 + 1 }};
 {% endfor %}
 }
-{% endfor %}
+{% endfor %}