Default Build to multi-platform amd64 and arm64 (#1557)

* add linux/arm64 as a platform to build the operator by default

* set platforms in dockerfile

* use tag instead of sha

* update tag version

* update base image to latest

Author: rlieberman-splunk

Dockerfile

@@ -1,11 +1,11 @@
 # Setup defaults for build arguments
-ARG PLATFORMS=linux/amd64
+ARG PLATFORMS=linux/amd64,linux/arm64
 
 # Use distroless as minimal base image to package the manager binary
 # Refer to https://github.com/GoogleContainerTools/distroless for more details
-# This sha relates to ubi minimal version 8.10-1753676782, which is tagged as 8.10 and latest as of Jul 28, 2025
-ARG BASE_IMAGE=registry.access.redhat.com/ubi8/ubi-minimal@sha256
-ARG BASE_IMAGE_VERSION=88d40445bdf35b3b848371dec918b7d6ed0ef0e03a4e0f510c10be536e4aa1c9
+# This sha relates to ubi minimal version 8.10-1755105495, which is tagged as 8.10 and latest as of Aug 17, 2025
+ARG BASE_IMAGE=registry.access.redhat.com/ubi8/ubi-minimal
+ARG BASE_IMAGE_VERSION=8.10-1755105495
 
 # Build the manager binary
 FROM golang:1.24.2 AS builder

Makefile

@@ -156,14 +156,14 @@ docker-push: ## Push docker image with the manager.
 # Docker-buildx is used to build the image for multiple OS/platforms
 # IMG is a mandatory argument to specify the image name
 # Defaults:
-#   Build Platform: linux/amd64
-#   Build Base OS: registry.access.redhat.com/ubi8/ubi-minimal@sha256
-#   Build Base OS Version: 88d40445bdf35b3b848371dec918b7d6ed0ef0e03a4e0f510c10be536e4aa1c9 (corresponds to tag 8.10-1753676782)
+#   Build Platform: linux/amd64,linux/arm64
+#   Build Base OS: registry.access.redhat.com/ubi8/ubi-minimal
+#   Build Base OS Version: 8.10-1755105495
 # Pass only what is required, the rest will be defaulted
 # Setup defaults for build arguments
-PLATFORMS ?= linux/amd64
-BASE_IMAGE ?= registry.access.redhat.com/ubi8/ubi-minimal@sha256
-BASE_IMAGE_VERSION ?= 88d40445bdf35b3b848371dec918b7d6ed0ef0e03a4e0f510c10be536e4aa1c9
+PLATFORMS ?= linux/amd64,linux/arm64
+BASE_IMAGE ?= registry.access.redhat.com/ubi8/ubi-minimal
+BASE_IMAGE_VERSION ?= 8.10-1755105495
 
 docker-buildx:
 	@if [ -z "${IMG}" ]; then \