fix(cmd): incorrect local database url

.EXAMPLE.env

@@ -2,4 +2,4 @@ AWS_ACCESS_KEY_ID=**************************
 AWS_SECRET_ACCESS_KEY=****************************************************************
 AWS_DEFAULT_REGION=******
 AWS_ENDPOINT_URL=http://localhost:3900
-DATABASE_URL=file://./libsql.db
+DATABASE_URL=file:./libsql.db

cmd/cmd.go

@@ -30,7 +30,7 @@ var (
 )
 
 var (
-	databaseURL = getEnv("DATABASE_URL", "file://./libsql.db")
+	databaseURL = getEnv("DATABASE_URL", "file:./libsql.db")
 
 	awsAccessKeyID     = os.Getenv("AWS_ACCESS_KEY_ID")
 	awsSecretAccessKey = os.Getenv("AWS_SECRET_ACCESS_KEY")