How to set roles and users with correct permissions on Postgres? [closed]

My current database uat has as owner postgres. But now I would like to set roles and users with the correct permissions. Something simple like:

roles: dba, developer, application

users: dba1, dev1, dev2, app1

Where dba can do anything on the database for administration purposes; developer can makes SELECT, UPDATE and INSERT, usual developer operations; app1 the same operations as the developer role, for now.

How can I make this correctly ? And who should be the owner of my production table in this new setup ?

UPDATE:

------------------------
-- INITIAL SETUP
------------------------

-- create uat database
create database uat;

-- dba role
create role dba with superuser createdb createrole nologin replication bypassrls;

-- dev role
create role dev with nosuperuser nocreatedb nocreaterole nologin noreplication nobypassrls;

-- app role
create role app with nosuperuser nocreatedb nocreaterole nologin noreplication nobypassrls;

-- alter postgres password
alter role postgres encrypted password '';

-- create users

create user dev1 login inherit encrypted password '' in role dev;
create user dev2 login inherit encrypted password '' in role dev;
create user dev3 login inherit encrypted password '' in role dev;
create user dev4 login inherit encrypted password '' in role dev;

create user webapp encrypted password '' in role app;

-- grant privileges to dba role
grant all privileges on all tables in schema public to dba;

------------------------
-- RESTORE 
------------------------
psql -U postgres -d uat -h localhost -W -p 5432 < uat.sql 

But when I logged in as user dev1 for example, I can’t do anything:

select * from guru_basket_security;

Listing access for this table:

    z    
                                                              Access privileges
     Schema |                         Name                         |   Type   |     Access privileges     | Column privileges | Policies 
    --------+------------------------------------------------------+----------+---------------------------+-------------------+----------
     public | guru_basket_security                                 | table    |                           |                   | 
     public | identifier                                           | table    | postgres=arwdDxt/postgres |                   | 

I got these errors:

ERROR:  permission denied for relation guru_basket_security
ERROR:  permission denied for relation identifier