## Description
With the migration to postgres as Appsmith's persistent database we
wanted to have central DB to be consumed by internal services. Currently
all the services try to create the same DB and may end up in a race
condition, so we are moving this task to `entrypoint.sh`.
Steps:
1. Initialise data directory for pg
2. Run the upgrade migration if necessary
3. Start the pg server
4. Create `appsmith` db with postgres user
5. Stop the pg server
/test Sanity
### 🔍 Cypress test results
<!-- This is an auto-generated comment: Cypress test results -->
> [!TIP]
> 🟢🟢🟢 All cypress tests have passed! 🎉🎉🎉
> Workflow run:
<https://github.com/appsmithorg/appsmith/actions/runs/11212147481>
> Commit: e3840764acb3088233bf6552d74721abb00518a6
> <a
href="https://internal.appsmith.com/app/cypress-dashboard/rundetails-65890b3c81d7400d08fa9ee5?branch=master&workflowId=11212147481&attempt=1"
target="_blank">Cypress dashboard</a>.
> Tags: `@tag.Sanity`
> Spec:
> <hr>Mon, 07 Oct 2024 09:31:39 UTC
<!-- end of auto-generated comment: Cypress test results -->
## Communication
Should the DevRel and Marketing teams inform users about this change?
- [ ] Yes
- [x] No
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
- **New Features**
- Improved database initialization logic for the Appsmith application.
- Automatically creates the Appsmith database if it does not already
exist during startup.
- **Bug Fixes**
- Enhanced robustness of the database setup process with existence
checks before creation.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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