Add tests for launcher's creation of the nginx config file.
Add PostgreSQL initializers and runtimes in nginx.conf.

[#60019012]
[WIP] Add scheleton of PostgreSql adapter.

[#60019012]
Use shallow copy instead of deepcopy in mysql detached adapter.
Use PosgreSql adapter's location and execute location methods.

[#60019012]
Complete PostgreSQL adapter.

[#60019012]
Add PostgreSql detached adapter.

[#60019012]
Add PostgreSql ORM.
Make PostgreSql adapter and ORM work.

[Finishes #60019012]
Fix launcher tests.
Fix database migration errors.
DRY up sql ORMs.
DRY up postgresql adapters.
Add changelog.
Set version to v0.1.1.
Added before_action and after_action signals
Create a handler_error method for Router in order to handle all erorrs from router
Handler error from create_request in Router.handle_error
Handler error from Router.handle with Router.handle_error
Fix typo