Install Terraform in devcontainer via HashiCorp apt repo

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: whummer

.devcontainer/Dockerfile.github

@@ -1,6 +1,11 @@
 FROM mcr.microsoft.com/devcontainers/universal
 
-RUN sudo apt-get update && sudo apt-get install -y curl jq
+RUN sudo apt-get update && sudo apt-get install -y curl jq gnupg lsb-release
+
+# Install Terraform via HashiCorp apt repo
+RUN curl -fsSL https://apt.releases.hashicorp.com/gpg | sudo gpg --dearmor -o /usr/share/keyrings/hashicorp-archive-keyring.gpg && \
+    echo "deb [signed-by=/usr/share/keyrings/hashicorp-archive-keyring.gpg] https://apt.releases.hashicorp.com $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/hashicorp.list && \
+    sudo apt-get update && sudo apt-get install -y terraform
 
 # Install LocalStack CLI, AWS CLI, and local wrappers
 RUN pip install localstack awscli awscli-local terraform-local pytest requests