bin/install.sh: add packer installation

README.md

@@ -41,14 +41,14 @@ Already have a clone? Just run it directly:
   linked release binaries into `~/.local/bin`: jq, kubectl, helm, k9s,
   kubectx/kubens, stern, yq, OpenTofu, terragrunt, task (go-task, the
   Taskfile runner), the 1Password CLI `op` for secrets storage, the
-  opencode coding agent, and zarf (DevSecOps for Offline and Airgapped
-  Kubernetes). kind is installed
-  only when full (non-rootless) Docker is available — it doesn't work
-  against rootless Docker, so it is skipped on Kasm. No sudo, nothing
-  outside `$HOME`, so tools persist across Kasm redeploys with no
-  reinstall. Idempotent: each tool records its version under
-  `~/.local/bin/.versions` and is skipped when the pinned version is
-  already present. `zsh/zshrc` puts `~/.local/bin` on `PATH`.
+  opencode coding agent, zarf (DevSecOps for Offline and Airgapped
+  Kubernetes), and packer (HashiCorp's infrastructure build tool).
+  kind is installed only when full (non-rootless) Docker is available —
+  it doesn't work against rootless Docker, so it is skipped on Kasm.
+  No sudo, nothing outside `$HOME`, so tools persist across Kasm
+  redeploys with no reinstall. Idempotent: each tool records its version
+  under `~/.local/bin/.versions` and is skipped when the pinned version
+  is already present. `zsh/zshrc` puts `~/.local/bin` on `PATH`.
 
   opencode is configured by `mcp-config/`: it points at the covert-gpt
   LiteLLM gateway (`https://llm.covert-gpt.com/v1` for models,