docs: Add readme for spring-petclinic

spring-petclinic/README.md

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+## Introduction
+
+This is a petclinic website where you can record testcases and mocks by interacting with the UI, and then test them using Keploy.
+This project has two parts - the frontend and backend, since Keploy is a backend testing platform, we need to start the backend part of the project
+using Keploy and run the frontend as it is.
+
+## Setup the frontend
+
+```
+git clone https://github.com/keploy/samples-java.git
+cd samples-java/spring-petclinic/spring-petclinic-angular
+npm uninstall -g angular-cli @angular/cli
+npm cache clean
+npm install -g @angular/cli@latest
+npm install --save-dev @angular/cli@latest
+npm i
+```
+
+## Start the frontend
+
+```
+npm run start
+```
+
+## Spin up the database
+
+```
+docker run -e POSTGRES_USER=petclinic -e POSTGRES_PASSWORD=petclinic -e POSTGRES_DB=petclinic -p 5432:5432 --net keploy-network  postgres:15.2
+```
+
+## Setup Keploy
+
+```
+wget https://raw.githubusercontent.com/keploy/keploy/main/keploy.sh && source keploy.sh
+```
+
+## Setup the backend
+
+```
+cd samples-java/spring-petclinic/spring-petclinic-rest
+mvn clean install -Dmaven.test.skip=true
+```
+
+## Run the backend with Keploy
+
+```
+keploy record -c "java -jar target/<name-of-your-jar>"
+```
+
+Now when you interact with the UI, the tests should start getting created in a folder called 'keploy' in the directory where you started the backend. When you are done recording the testcases and mocks, you can test them using keploy.
+
+## Testing the testcases using Keploy
+
+```
+keploy test -c "java -jar target/<name-of-your-jar>"
+```
+
+Hope this helps you out, if you still have any questions, reach out to us on our [Slack](https://join.slack.com/t/keploy/shared_invite/zt-12rfbvc01-o54cOG0X1G6eVJTuI_orSA)
+
+
+