Add settings persistance on backend

backend/internal/db/db.go

@@ -0,0 +1,33 @@
+package db
+
+import (
+	"database/sql"
+
+	_ "github.com/mattn/go-sqlite3"
+)
+
+type DB struct {
+	*sql.DB
+}
+
+func Init(dbPath string) (*DB, error) {
+	db, err := sql.Open("sqlite3", dbPath)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := db.Ping(); err != nil {
+		return nil, err
+	}
+
+	database := &DB{db}
+	if err := database.Migrate(); err != nil {
+		return nil, err
+	}
+
+	return database, nil
+}
+
+func (db *DB) Close() error {
+	return db.DB.Close()
+}