* Terraform: Add proxy setting (#435)

* Terraform: Remove unused variable GPG_OPTS (#435)

* Terraform: Increment minor version (#435)

* Update src/terraform/install.sh
Co-authored-by: Samruddhi Khandale <skhandale@microsoft.com>

* Add feature option

* Update src/terraform/devcontainer-feature.json
Co-authored-by: Samruddhi Khandale <skhandale@microsoft.com>

* Update src/terraform/devcontainer-feature.json
Co-authored-by: Samruddhi Khandale <skhandale@microsoft.com>

* Update src/terraform/devcontainer-feature.json
Co-authored-by: Samruddhi Khandale <skhandale@microsoft.com>

* Terraform: Change environment variables to upper case (#435)

* Terraform: Use HTTP_PROXY as the default for connecting to keyservers (#435)

* Update src/terraform/install.sh
Co-authored-by: Samruddhi Khandale <samruddhikhandale@github.com>

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Co-authored-by: Samruddhi Khandale <skhandale@microsoft.com>
Co-authored-by: Samruddhi Khandale <samruddhikhandale@github.com>