issues found

Node.js 16 actions are deprecated. Please update the following actions to use Node.js 20: actions/setup-go@v3, actions/cache@v1, golangci/golangci-lint-action@v3. For more information see: https://github.blog/changelog/2023-09-22-github-actions-transitioning-from-node-16-to-node-20/.

The following actions uses node12 which is deprecated and will be forced to run on node16: actions/cache@v1. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/

var-declaration: should drop = 0 from declaration of var totalCost; it is the zero value (revive)