* Upgrade provider plugins to latest release
* Improve README instructions
* Convert locals in main.tf to vars
* Add output for db proxy public IP to make connecting easier
* Add plan and crash.log to .gitignore
* Move backend config to backend.tf
* Move provider config to providers.tf
* Move required_versions to versions.tf
* Upgrade db from Postgres 11 -> 13
* Upgrade tfe and google provider plugins
* Remove google-beta provider since it's no longer needed
* Add .terraform-version file to support tfenv
* Add .vscode/ settings to play nice with VSCode
* Clean up .gitignore