Add migrations and continue implementing election insertion

internal/db/migrations.go

@@ -0,0 +1,37 @@
+package db
+
+import (
+	"database/sql"
+	"embed"
+	"errors"
+	"github.com/golang-migrate/migrate/v4"
+	msqlite3 "github.com/golang-migrate/migrate/v4/database/sqlite3"
+	_ "github.com/golang-migrate/migrate/v4/source/file"
+	"github.com/golang-migrate/migrate/v4/source/iofs"
+)
+
+//go:embed migrations/*.sql
+var migrationsFS embed.FS
+
+func RunMigrations(db *sql.DB) error {
+	driver, err := msqlite3.WithInstance(db, &msqlite3.Config{})
+	if err != nil {
+		return err
+	}
+
+	d, err := iofs.New(migrationsFS, "migrations")
+	if err != nil {
+		return err
+	}
+
+	m, err := migrate.NewWithInstance("iofs", d, "sqlite", driver)
+	if err != nil {
+		return err
+	}
+
+	if err = m.Up(); err != nil && !errors.Is(migrate.ErrNoChange, err) {
+		return err
+	}
+
+	return nil
+}