docs: add install instructions

README.md

@@ -0,0 +1,25 @@
+# Coffeeshop Demo app
+
+## Pre-requisites
+
+- [Java 11](https://adoptopenjdk.net/installation.html) and [Maven](https://maven.apache.org/install.html)
+- [NodeJS](https://nodejs.org/en/download/)
+- [Docker-compose](https://docs.docker.com/compose/install/)
+
+## Run locally
+
+```bash
+docker-compose up
+cd barista-node/ && npm install && npm start
+cd barista-kafka/ && mvn compile quarkus:dev
+cd coffeeshop-service/ && mvn compile quarkus:dev
+```
+
+**Note**: `barista-http` is not required.
+
+## Clean up
+
+```bash
+docker-compose down
+docker-compose rm
+```