initial commit on ci branch: migrates code from private repo

dockerfiles/gh-cli/Dockerfile

@@ -0,0 +1,15 @@
+# Copyright 2020-2024 the Pinniped contributors. All Rights Reserved.
+# SPDX-License-Identifier: Apache-2.0
+
+# For running the GitHub CLI.
+FROM debian:12.7-slim AS builder
+
+RUN apt-get update && apt-get install -y curl && rm -rf /var/lib/apt/lists/*
+
+RUN curl \
+    -sfLo /tmp/gh.tar.gz \
+    https://github.com/cli/cli/releases/download/v2.40.0/gh_2.40.0_linux_amd64.tar.gz \
+    && tar -C /tmp --strip-components=1 -xzvf /tmp/gh.tar.gz
+
+FROM golang:1.23.2
+COPY --from=builder /tmp/bin/gh /usr/local/bin/gh