Swap to alpine container to minimize dependencies

Signed-off-by: Austin Vazquez <[email protected]>

.codebuild/buildspec.yml

@@ -4,6 +4,7 @@ phases:
   install:
     commands:
       - chmod +x -R scripts
+      - ./scripts/install_deps.sh
       - ./scripts/hack/codepipeline-git-commit.sh
       - ./scripts/hack/symlink-gopath-codebuild.sh
       - cd /go/src/github.com/awslabs/amazon-ecr-credential-helper

.github/workflows/build.yaml

@@ -28,8 +28,10 @@ jobs:
 
   cross-compile:
     runs-on: 'ubuntu-22.04'
-    container: public.ecr.aws/docker/library/golang:1.21
+    container: public.ecr.aws/docker/library/golang:1.21-alpine
     steps:
+      - name: Install dependencies to container
+        run: ./scripts/install_deps.sh
       - uses: actions/checkout@v4
         with:
           path: src/github.com/awslabs/amazon-ecr-credential-helper

scripts/install_deps.sh

@@ -0,0 +1,25 @@
+#!/bin/sh
+
+# Copyright 2024 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"). You
+# may not use this file except in compliance with the License. A copy of
+# the License is located at
+#
+# 	http://aws.amazon.com/apache2.0/
+#
+# or in the "license" file accompanying this file. This file is
+# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
+# ANY KIND, either express or implied. See the License for the specific
+# language governing permissions and limitations under the License.
+
+# A POSIX shell script which installs the required dependencies
+# to build the Amazon ECR credential helper variants in a Golang
+# Alpine container.
+
+set -ex
+
+apk add --no-cache \
+    bash \
+    git \
+    make