Terraform, DigitalOcean, Failed to query available provider packages

There is slight chance that during getting started with Digital Ocean tutorial you encountered the following error

$ terraform init                

Initializing the backend...

Initializing provider plugins...
- Finding latest version of hashicorp/digitalocean...
╷
│ Error: Failed to query available provider packages

The solution to that is deliver required_providers section into your main.tf

terraform {
    required_providers {
        digitalocean = {
            source = "digitalocean/digitalocean"
            version = ">= 2.4.0"
        }
        kubernetes = {
            source = "hashicorp/kubernetes"
            version = ">= 2.0.0"
        }
    }
}

Now the terraform init command should be executed successfully