Setup migrations for user database

services/user/cmd/migrate/main.go

@@ -0,0 +1,24 @@
+package migrate
+
+import (
+	"log"
+
+	"github.com/golang-migrate/migrate/v4"
+	_ "github.com/golang-migrate/migrate/v4/database/postgres"
+	_ "github.com/golang-migrate/migrate/v4/source/file"
+)
+
+// RunMigrations applies all migrations
+func RunMigrations(databaseURL string, migrationsDir string) {
+	m, err := migrate.New("file://"+migrationsDir, databaseURL)
+
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	if err := m.Up(); err != nil && err != migrate.ErrNoChange {
+		log.Fatal(err)
+	}
+
+	log.Println("Migrations applied successfully!")
+}

services/user/migrations/000001_create_users_table.down.sql

@@ -0,0 +1 @@
+DROP TABLE users;

services/user/migrations/000001_create_users_table.up.sql

@@ -0,0 +1,7 @@
+CREATE TABLE users (
+    user_id SERIAL PRIMARY KEY,
+    username VARCHAR(50) UNIQUE NOT NULL,
+    email VARCHAR(255) UNIQUE NOT NULL,
+    password_hash VARCHAR(255) NOT NULL,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);