Add flow diagram producer->buffer->consumer

README.md

@@ -5,6 +5,17 @@
 
 `bounded-queue` helps solves the [producer–consumer problem](https://en.wikipedia.org/wiki/Producer%E2%80%93consumer_problem).
 
+```mermaid
+graph LR;
+    P(Producer);
+    B[bounded-queue];
+    C(Consumer);
+    P-- batched item -->B;
+    B-- batched item -->C;
+    style B fill:#99E,stroke:#333
+```
+The `bounded-queue` allows the producer and consumer to operate in 
+
 ## Introduction
 
 Imagine you have to read records from a database and write those to another database.