fixed naming of tables to be plural and fixed order of migration execution

migrations/006_create-role-table.js

@@ -0,0 +1,16 @@
+export const up = (pgm) => {
+	pgm.sql(`
+          CREATE TABLE roles (
+            id UUID PRIMARY KEY,
+            name TEXT UNIQUE NOT NULL,
+            created_at TIMESTAMP DEFAULT NOW(),
+            updated_at TIMESTAMP DEFAULT NOW()
+          );
+        `)
+}
+
+export const down = (pmg) => {
+	pgm.sql(`
+        DROP TABLE roles;
+      `)
+}