Bumps to Alpine 3.20.2

Signed-off-by: Adrian Cole <adrian.cole@elastic.co>

Dockerfile

@@ -18,7 +18,7 @@
 # When updating, update the README and the alpine_version ARG
 #  * Use current version from https://alpinelinux.org/downloads/
 #  * ARGs repeat because Dockerfile ARGs are layer specific but will reuse the value defined here.
-ARG alpine_version=3.20.0
+ARG alpine_version=3.20.2
 
 # We copy files from the context into a scratch container first to avoid a problem where docker and
 # docker-compose don't share layer hashes https://github.com/docker/compose/issues/883 normally.
@@ -29,7 +29,7 @@ COPY . /code/
 
 # See from a previously published version to avoid pulling from Docker Hub (docker.io)
 # This version is only used to install the real version
-FROM ghcr.io/openzipkin/alpine:3.18.5 as install
+FROM ghcr.io/openzipkin/alpine:3.20.0 as install
 
 WORKDIR /code
 # Conditions aren't supported in Dockerfile instructions, so we copy source even if it isn't used.

README.md

@@ -13,22 +13,22 @@ This is an internal base layer primarily used in [docker-java](https://github.co
 
 To browse the image, run it in interactive mode with TTY enabled like so:
 ```bash
-docker run -ti --rm ghcr.io/openzipkin/alpine:3.20.0
+docker run -ti --rm ghcr.io/openzipkin/alpine:3.20.2
 / #
 ```
 
 ## Release process
 Build the `Dockerfile` using the current version from https://alpinelinux.org/downloads/:
 ```bash
-# Note 3.20.0 not 3.19!
-./build-bin/build 3.20.0
+# Note 3.20.2 not 3.19!
+./build-bin/build 3.20.2
 ```
 
 Next, verify the built image matches that version:
 ```bash
 docker run --rm openzipkin/alpine:test -c 'cat /etc/alpine-release'
-3.20.0
+3.20.2
 ```
 
-To release the image, push a tag matching the arg to `build-bin/build` (ex `3.20.0`).
+To release the image, push a tag matching the arg to `build-bin/build` (ex `3.20.2`).
 This triggers a [GitHub Actions](https://github.com/openzipkin/docker-alpine/actions) job to push the image.