Minor improvements

Author: YuryHrytsuk

services/postgres/scripts/init.sql

@@ -9,5 +9,5 @@ Sources:
 * https://www.reddit.com/r/PostgreSQL/comments/1hvxw0s/understanding_the_public_schema_in_postgresql/
 */
 
--- It is not global. Execute this per database
+-- As a superuser, run the following command in all of your databases
 REVOKE CREATE ON SCHEMA public FROM PUBLIC;

services/postgres/scripts/remove-readonly-role.sql.template

@@ -12,6 +12,6 @@ ALTER DEFAULT PRIVILEGES IN SCHEMA public REVOKE ALL ON TABLES FROM ${POSTGRES_D
 ALTER DEFAULT PRIVILEGES IN SCHEMA public REVOKE ALL ON SEQUENCES FROM ${POSTGRES_DB}_readonly;
 ALTER DEFAULT PRIVILEGES IN SCHEMA public REVOKE ALL ON FUNCTIONS FROM ${POSTGRES_DB}_readonly;
 
-DROP ROLE ${POSTGRES_DB}_readonly;
+DROP ROLE IF EXISTS ${POSTGRES_DB}_readonly;
 
 SELECT * FROM pg_roles WHERE rolname NOT LIKE 'pg_%';

services/postgres/scripts/remove-readonly-user.sql.template

@@ -1,6 +1,6 @@
 -- Revoke readonly role from user
 REVOKE ${POSTGRES_DB}_readonly FROM ${POSTGRES_READONLY_USER};
 
-DROP USER ${POSTGRES_READONLY_USER};
+DROP USER IF EXISTS ${POSTGRES_READONLY_USER};
 
 SELECT * FROM pg_roles WHERE rolname NOT LIKE 'pg_%';