chore(docker): get remote images' digest without pulling them

snippets/manage archives.sh

@@ -0,0 +1,19 @@
+#!/usr/bin/env sh
+
+# `tar -a` guesses the compression algorithm from the archive extension
+
+# Create archives
+tar czvf "/tmp/prometheus-data-$(date +'%s-%F-%H-%m-%S').tar.gz" '/var/lib/prometheus/data'
+tar cjpvf 'docs.tar.bz2' "${HOME}/Documents" "${HOME}/Downloads" 'docs.txt'
+
+# List the contents of archives
+tar tf "/tmp/prometheus-data-1718104097-2024-06-11-11-06-17.tar.gz"
+tar tf 'kubectl.tar' 'kubectl'
+
+# Test archives by reading their contents or extracting them to stdout.
+tar tf 'archive.tar' > '/dev/null'
+tar tOf 'archive.tar' > '/dev/null'
+
+# Extract archives
+tar xf 'portage-latest.tar.xz' -C '/mnt/gentoo/usr'
+tar xpf 'stage3-amd64-'*'.tar.xz' --checkpoint '250'