base: update to Alpine 3.20.3.

This updates the Alpine base image to use a newer stable branch. Among
general updates, we are interested in avoiding a GCC bug that's present
in 3.18 [1].

Due to the deprecation of distutils in the standard Python library [2],
it was necessary to add the setuptools package.

[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105329
[2] https://peps.python.org/pep-0632/

base/.env

@@ -1,5 +1,5 @@
 DEBIAN_VERSION=11.9
-ALPINE_VERSION=3.18.6
+ALPINE_VERSION=3.20.3
 
 EPICS7_BASE_VERSION=7.0.7
 PVXS_VERSION=1.3.1

base/musl/Dockerfile

@@ -30,6 +30,7 @@ RUN apk add --no-cache \
     readline-static \
     ncurses-static \
     python3-dev \
+    py3-setuptools \
     py3-numpy-dev
 
 COPY lnls-get-n-unpack.sh /usr/local/bin/lnls-get-n-unpack