Devansh Sehgal 88fda3b143 Add buildx multi-arch build target to backup/pvc Makefile ... Introduce PLATFORMS default (arm64, amd64, s390x, ppc64le) and a docker-buildx target to build and push multi-arch images (IMG=...). The target generates a Dockerfile.cross with platform support, creates and uses a buildx builder, passes UID/GID build args, and cleans up. Mirrors the root Makefile to enable cross-arch image builds. Fixes #1124		2025-10-07 06:51:37 +05:30
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pvc	Add buildx multi-arch build target to backup/pvc Makefile	2025-10-07 06:51:37 +05:30