Switch to modernc.org/sqlite and update dockerfile

backend/internal/database/sqlite.go

@@ -3,11 +3,11 @@ package database
 import (
 	"database/sql"
 
-	_ "github.com/mattn/go-sqlite3"
+	_ "modernc.org/sqlite"
 )
 
 func ConnectSQLite(dbPath string) (*sql.DB, error) {
-	db, err := sql.Open("sqlite3", dbPath+"?_busy_timeout=5000&_journal_mode=WAL")
+	db, err := sql.Open("sqlite", dbPath+"?_busy_timeout=5000&_journal_mode=WAL")
 	if err != nil {
 		return nil, err
 	}