Add crane image

crane/README.md

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+# crane
+
+The [crane](https://gitea.elara.ws/Elara6331/-/packages/container/crane/latest) image contains Google's [crane](https://github.com/google/go-containerregistry/tree/main/cmd/crane) project.

crane/build.sh

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+#!/bin/bash
+
+set -e
+
+# Clone go-containerregistry and enter crane's directory
+git clone --depth=1 https://github.com/google/go-containerregistry.git
+pushd go-containerregistry/cmd/crane
+
+# Build and publish the image
+KO_DOCKER_REPO=gitea.elara.ws/elara6331 \
+KO_DEFAULTBASEIMAGE=gitea.elara.ws/elara6331/busybox \
+ko build -B \
+	--platform=linux/amd64,linux/arm64,linux/riscv64 \
+	--sbom=none
+
+# Leave crane's directory
+popd