added start.sh script

[Mpasha17]

About the PR

Running the app was Diffucult so added start.sh script which makes the app to run easily with just two commands

#PR Description:
This PR introduces a new start.sh script to the repository, designed to simplify and automate the local development setup for Morphik.
The script performs the following key actions:
Checks for Docker and Docker Compose prerequisites
Creates a .env file with default environment variables if one does not exist
Ensures required directories (such as storage and logs) are present
Builds and starts all services using Docker Compose
Waits for all containers to become healthy before indicating readiness
Provides clear instructions for accessing the API and viewing logs

**How to use
chmod +x start.sh
./start.sh

[jazzberry-ai]

Bug Report

Name	Severity	Example test case	Description
Hardcoded JWT Secret Key	Critical	Inspect the .env file.	The JWT secret key is hardcoded to 'your-secret-key-here', which compromises the security of the application.

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[CLAassistant]

All committers have signed the CLA.

[ArnavAgrawal03]

thank you for your contribution!