Update compiler/README.md with nano codegen commandline
diff --git a/compiler/README.md b/compiler/README.md
index 59c3ebf..2750fc1 100644
--- a/compiler/README.md
+++ b/compiler/README.md
@@ -31,3 +31,8 @@
 $ protoc --plugin=protoc-gen-java_rpc=build/binaries/java_pluginExecutable/java_plugin \
   --java_rpc_out="$OUTPUT_FILE" --proto_path="$DIR_OF_PROTO_FILE" "$PROTO_FILE"
 ```
+To generate Java interfaces with protobuf nano:
+```
+$ protoc --plugin=protoc-gen-java_rpc=build/binaries/java_pluginExecutable/java_plugin \
+  --java_rpc_out=nano=true:"$OUTPUT_FILE" --proto_path="$DIR_OF_PROTO_FILE" "$PROTO_FILE"
+```