feat: upgrade Alpine to 3.20, libexecinfo fixes, make tests work

Dockerfile

@@ -1,9 +1,6 @@
-# https://aws.amazon.com/blogs/aws/new-for-aws-lambda-container-image-support/
-# libexec is missing from >=3.17
-
 # Stage 1 - bundle base image + runtime
-FROM python:3.12-alpine3.19 AS python-alpine
-ARG  ALPINE="v3.19"
+FROM python:3.12-alpine3.20 AS python-alpine
+ARG  ALPINE="v3.20"
 
 # Install GCC (Alpine uses musl but we compile and link dependencies with GCC)
 RUN echo "@kubezero https://cdn.zero-downtime.net/alpine/${ALPINE}/kubezero" >> /etc/apk/repositories && \
@@ -29,7 +26,7 @@ RUN apk --no-cache add \
     libcurl \
     libffi-dev \
     openssl-dev \
-    libexecinfo-dev@kubezero
+    elfutils-dev
     # cargo
 
 # Install requirements

run_tests.sh

@@ -9,6 +9,7 @@ buildah copy $ctr dev-requirements.txt .flake8 .
 buildah copy $ctr aws-lambda-rie
 buildah copy $ctr tests/ tests/
 
+buildah run $ctr apk add zstd-libs
 buildah run $ctr pip install -r dev-requirements.txt --target .
 
 buildah run $ctr python -m flake8 app.py