Modify docker files from mariadb to postgreSQL

scripts/db/init.sql

@@ -1,7 +1,8 @@
-DROP USER IF EXISTS 'sik';
-FLUSH PRIVILEGES;
-CREATE USER 'sik'@'%' IDENTIFIED BY 'password123';
-CREATE DATABASE IF NOT EXISTS sik DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;
-GRANT ALL PRIVILEGES ON `sik\_%` . * TO 'sik'@'%' IDENTIFIED BY 'password123';
-GRANT ALL PRIVILEGES ON sik.* TO 'sik'@'%';
-
+DROP ROLE IF EXISTS sik;
+CREATE USER sik WITH PASSWORD 'password123';
+ALTER ROLE sik SET client_encoding TO 'utf8';
+ALTER ROLE sik SET default_transaction_isolation TO 'read committed';
+ALTER ROLE sik SET timezone TO 'UTC';
+CREATE DATABASE sik 
+    ENCODING 'UTF8' 
+    OWNER sik;