Global Terraform plugin installation

simply add this TF_PLUGIN_CACHE_DIR to your environment variables and future plugins downloaded with terraform init will go there:

TF_PLUGIN_CACHE_DIR=$HOME/.terraform.d/plugin-cache

links:

• cover image by geralt/Gerd Altmann https://pixabay.com/en/arrows-center-inside-middle-1426326/
• https://github.com/hashicorp/terraform/issues/15801#issuecomment-408645788
• https://www.terraform.io/docs/configuration/providers.html#provider-plugin-cache