feat: update alpine default version

Author: ldez

docs/seihon_publish.md

@@ -13,7 +13,7 @@ seihon publish [flags]
 ### Options
 
 ```
-  -b, --base-runtime-image string   Base Docker image. (default "alpine:3.13")
+  -b, --base-runtime-image string   Base Docker image. (default "alpine:3.15")
       --dry-run                     Dry run mode. (default true)
   -h, --help                        help for publish
   -i, --image-name string           Image name (user/repo)

main.go

@@ -94,7 +94,7 @@ func newPublishCmd() *cobra.Command {
 	flags.StringVarP(&opts.imageName, "image-name", "i", "", "Image name (user/repo)")
 	flags.StringSliceVarP(&opts.versions, "versions", "v", nil, "Image version.")
 	flags.StringVar(&opts.dockerfileTemplate, "template", "./tmpl.Dockerfile", "Dockerfile template")
-	flags.StringVarP(&opts.baseRuntimeImage, "base-runtime-image", "b", "alpine:3.13", "Base Docker image.")
+	flags.StringVarP(&opts.baseRuntimeImage, "base-runtime-image", "b", "alpine:3.15", "Base Docker image.")
 	flags.StringSliceVar(&opts.targets, "targets", []string{"arm.v6", "arm.v7", "arm.v8", "amd64", "386"}, "Targeted architectures.")
 	flags.BoolVar(&opts.dryRun, "dry-run", true, "Dry run mode.")
 

publish/dockerpub_test.go

@@ -14,7 +14,7 @@ func TestNewDockerPub(t *testing.T) {
 	targets, err := GetTargetedArchitectures([]string{"arm.v6", "arm.v7", "arm.v8", "amd64", "386"})
 	require.NoError(t, err)
 
-	pub, err := NewDockerPub("image", []string{"v666", "latest"}, "alpine:3.13", targets, "./fixtures/example.Dockerfile")
+	pub, err := NewDockerPub("image", []string{"v666", "latest"}, "alpine:3.15", targets, "./fixtures/example.Dockerfile")
 	require.NoError(t, err)
 
 	defer func() { _ = pub.Clean(false) }()
@@ -43,7 +43,7 @@ func TestDockerPub_Execute(t *testing.T) {
 	targets, err := GetTargetedArchitectures([]string{"arm.v6", "arm.v7", "arm.v8", "amd64", "386"})
 	require.NoError(t, err)
 
-	pub, err := NewDockerPub("image", []string{"v666", "latest"}, "alpine:3.13", targets, "../tmpl.Dockerfile")
+	pub, err := NewDockerPub("image", []string{"v666", "latest"}, "alpine:3.15", targets, "../tmpl.Dockerfile")
 	require.NoError(t, err)
 
 	defer func() { _ = pub.Clean(false) }()