fix: create postgis extension on the app database

[franTarkenton]

postgis extension was being enabled on postgis database, suspect that it needs on the app "quickstart" database

Description

Changed the database that the bitnami postgis extension is being enabled on.

Fixes # (issue)

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

In related repo that used this template found that the postgis extension wasn't available on the user database that was created.

• - verified that the postgis extension worked after the change by running

SELECT name, default_version,installed_version FROM pg_available_extensions WHERE name LIKE 'postgis%' ;
SELECT PostGIS_Full_Version();

Checklist

• I have read the CONTRIBUTING doc
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have already been accepted and merged

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[mishraomp]

@franTarkenton Guy Lafleur in the town, yay, thanks for the fix.

[mishraomp]

LGTM