refactor: awscli -> s5cmd, add alpine 323

builder/Dockerfile.alpine-321

@@ -5,11 +5,9 @@ ENV OS_IDENTIFIER alpine-321
 RUN set -x \
   && apk add -q R-dev curl ca-certificates bash g++ tzdata openjdk17 texmf-dist texlive-full tar sed patch tcl tk tk-dev xvfb libdeflate libdeflate-dev
 
-# Install AWS CLI
-RUN curl "https://awscli.amazonaws.com/awscli-exe-linux-$(uname -m).zip" -o "awscliv2.zip" && \
-    unzip awscliv2.zip && \
-    ./aws/install && \
-    rm -rf aws awscliv2.zip
+# Install s5cmd for S3 uploads (much faster than AWS CLI)
+RUN ARCH=$(uname -m); if [ "$ARCH" = "x86_64" ]; then S5CMD_ARCH="64bit"; else S5CMD_ARCH="arm64"; fi && \
+    curl -sL "https://github.com/peak/s5cmd/releases/download/v2.3.0/s5cmd_2.3.0_Linux-${S5CMD_ARCH}.tar.gz" | tar xz -C /usr/local/bin s5cmd
 
 RUN curl -LO "https://github.com/goreleaser/nfpm/releases/download/v2.39.0/nfpm_2.39.0_$(arch).apk" && \
     apk add --allow-untrusted "./nfpm_2.39.0_$(arch).apk" && \