OCI: Trim total cold run time, by also using slim-bookworm for build

Author: amotl

Dockerfile

@@ -1,7 +1,7 @@
 # -----
 # Build
 # -----
-FROM python:3.13-bookworm AS build
+FROM python:3.13-slim-bookworm AS build
 
 # For more verbose output, use:
 # export BUILDKIT_PROGRESS=plain
@@ -10,6 +10,10 @@ FROM python:3.13-bookworm AS build
 ENV DEBIAN_FRONTEND=noninteractive
 ENV TERM=linux
 
+# Install prerequisites
+RUN apt-get update
+RUN apt-get --yes install wget
+
 # Configure build environment
 ENV PIP_ROOT_USER_ACTION=ignore
 ENV UV_COMPILE_BYTECODE=true