diff --git a/Makefile b/Makefile
index 69f76593..c6e24209 100644
--- a/Makefile
+++ b/Makefile
@@ -12,11 +12,16 @@
 TAG    := $(shell git rev-parse --short HEAD)
 OPERATOR_NAME := stackable-cockpit
 VERSION := $(shell cargo metadata --format-version 1 | jq -r '.packages[] | select(.name=="stackable-cockpitd") | .version')
+ARCH := $(shell uname -m | sed -e 's#x86_64#amd64#' | sed -e 's#aarch64#arm64#')
 
 DOCKER_REPO := docker.stackable.tech
 ORGANIZATION := stackable
-# this will be overwritten by an environmental variable if called from the github action
+OCI_REGISTRY_HOSTNAME := oci.stackable.tech
+OCI_REGISTRY_PROJECT_IMAGES := sdp
+OCI_REGISTRY_PROJECT_CHARTS := sdp-charts
+# This will be overwritten by an environmental variable if called from the github action
 HELM_REPO := https://repo.stackable.tech/repository/helm-dev
+HELM_CHART_NAME := ${OPERATOR_NAME}
 HELM_CHART_ARTIFACT := target/helm/${OPERATOR_NAME}-${VERSION}.tgz
 
 SHELL=/usr/bin/env bash -euo pipefail
@@ -27,11 +32,84 @@ SHELL=/usr/bin/env bash -euo pipefail
 
 ## Docker related targets
 docker-build:
-	docker build --force-rm --build-arg VERSION=${VERSION} -t "${DOCKER_REPO}/${ORGANIZATION}/${OPERATOR_NAME}:${VERSION}" -f docker/Dockerfile .
+	docker build --force-rm --build-arg VERSION=${VERSION} -t "${DOCKER_REPO}/${ORGANIZATION}/${OPERATOR_NAME}:${VERSION}-${ARCH}" -f docker/Dockerfile .
+	docker tag "${DOCKER_REPO}/${ORGANIZATION}/${OPERATOR_NAME}:${VERSION}-${ARCH}" "${OCI_REGISTRY_HOSTNAME}/${OCI_REGISTRY_PROJECT_IMAGES}/${OPERATOR_NAME}:${VERSION}-${ARCH}"
 
 docker-publish:
+	# Push to Nexus
 	echo "${NEXUS_PASSWORD}" | docker login --username github --password-stdin "${DOCKER_REPO}"
-	docker push --all-tags "${DOCKER_REPO}/${ORGANIZATION}/${OPERATOR_NAME}"
+	DOCKER_OUTPUT=$$(docker push --all-tags "${DOCKER_REPO}/${ORGANIZATION}/${OPERATOR_NAME}");\
+	# Obtain the digest of the pushed image from the output of `docker push`, because signing by tag is deprecated and will be removed from cosign in the future\
+	REPO_DIGEST_OF_IMAGE=$$(echo "$$DOCKER_OUTPUT" | awk '/^${VERSION}-${ARCH}: digest: sha256:[0-9a-f]{64} size: [0-9]+$$/ { print $$3 }');\
+	if [ -z "$$REPO_DIGEST_OF_IMAGE" ]; then\
+		echo 'Could not find repo digest for container image: ${DOCKER_REPO}/${ORGANIZATION}/${OPERATOR_NAME}:${VERSION}-${ARCH}';\
+		exit 1;\
+	fi;\
+	# This generates a signature and publishes it to the registry, next to the image\
+	# Uses the keyless signing flow with Github Actions as identity provider\
+	cosign sign -y "${DOCKER_REPO}/${ORGANIZATION}/${OPERATOR_NAME}@$$REPO_DIGEST_OF_IMAGE";\
+	# Generate the SBOM for the operator image, this leverages the already generated SBOM for the operator binary by cargo-cyclonedx\
+	syft scan --output cyclonedx-json=sbom.json --select-catalogers "-cargo-auditable-binary-cataloger" --scope all-layers --source-name "${OPERATOR_NAME}" --source-version "${VERSION}" "${DOCKER_REPO}/${ORGANIZATION}/${OPERATOR_NAME}@$$REPO_DIGEST_OF_IMAGE";\
+	# Determine the PURL for the container image\
+	PURL="pkg:docker/${ORGANIZATION}/${OPERATOR_NAME}@$$REPO_DIGEST_OF_IMAGE?repository_url=${DOCKER_REPO}";\
+	# Get metadata from the image\
+	IMAGE_DESCRIPTION=$$(docker inspect --format='{{.Config.Labels.description}}' "${DOCKER_REPO}/${ORGANIZATION}/${OPERATOR_NAME}:${VERSION}-${ARCH}");\
+	IMAGE_NAME=$$(docker inspect --format='{{.Config.Labels.name}}' "${DOCKER_REPO}/${ORGANIZATION}/${OPERATOR_NAME}:${VERSION}-${ARCH}");\
+	# Merge the SBOM with the metadata for the operator\
+	jq -s '{"metadata":{"component":{"description":"'"$$IMAGE_NAME. $$IMAGE_DESCRIPTION"'","supplier":{"name":"Stackable GmbH","url":["https://stackable.tech/"]},"author":"Stackable GmbH","purl":"'"$$PURL"'","publisher":"Stackable GmbH"}}} * .[0]' sbom.json > sbom.merged.json;\
+	# Attest the SBOM to the image\
+	cosign attest -y --predicate sbom.merged.json --type cyclonedx "${DOCKER_REPO}/${ORGANIZATION}/${OPERATOR_NAME}@$$REPO_DIGEST_OF_IMAGE"
+
+	# Push to Harbor
+	# We need to use "value" here to prevent the variable from being recursively expanded by make (username contains a dollar sign, since it's a Harbor bot)
+	docker login --username '${value OCI_REGISTRY_SDP_USERNAME}' --password '${OCI_REGISTRY_SDP_PASSWORD}' '${OCI_REGISTRY_HOSTNAME}'
+	DOCKER_OUTPUT=$$(docker push --all-tags '${OCI_REGISTRY_HOSTNAME}/${OCI_REGISTRY_PROJECT_IMAGES}/${OPERATOR_NAME}');\
+	# Obtain the digest of the pushed image from the output of `docker push`, because signing by tag is deprecated and will be removed from cosign in the future\
+	REPO_DIGEST_OF_IMAGE=$$(echo "$$DOCKER_OUTPUT" | awk '/^${VERSION}-${ARCH}: digest: sha256:[0-9a-f]{64} size: [0-9]+$$/ { print $$3 }');\
+	if [ -z "$$REPO_DIGEST_OF_IMAGE" ]; then\
+		echo 'Could not find repo digest for container image: ${OCI_REGISTRY_HOSTNAME}/${OCI_REGISTRY_PROJECT_IMAGES}/${OPERATOR_NAME}:${VERSION}-${ARCH}';\
+		exit 1;\
+	fi;\
+	# This generates a signature and publishes it to the registry, next to the image\
+	# Uses the keyless signing flow with Github Actions as identity provider\
+	cosign sign -y "${OCI_REGISTRY_HOSTNAME}/${OCI_REGISTRY_PROJECT_IMAGES}/${OPERATOR_NAME}@$$REPO_DIGEST_OF_IMAGE";\
+	# Generate the SBOM for the operator image, this leverages the already generated SBOM for the operator binary by cargo-cyclonedx\
+	syft scan --output cyclonedx-json=sbom.json --select-catalogers "-cargo-auditable-binary-cataloger" --scope all-layers --source-name "${OPERATOR_NAME}" --source-version "${VERSION}" "${OCI_REGISTRY_HOSTNAME}/${OCI_REGISTRY_PROJECT_IMAGES}/${OPERATOR_NAME}@$$REPO_DIGEST_OF_IMAGE";\
+	# Determine the PURL for the container image\
+	PURL="pkg:docker/${OCI_REGISTRY_PROJECT_IMAGES}/${OPERATOR_NAME}@$$REPO_DIGEST_OF_IMAGE?repository_url=${OCI_REGISTRY_HOSTNAME}";\
+	# Get metadata from the image\
+	IMAGE_DESCRIPTION=$$(docker inspect --format='{{.Config.Labels.description}}' "${OCI_REGISTRY_HOSTNAME}/${OCI_REGISTRY_PROJECT_IMAGES}/${OPERATOR_NAME}:${VERSION}-${ARCH}");\
+	IMAGE_NAME=$$(docker inspect --format='{{.Config.Labels.name}}' "${OCI_REGISTRY_HOSTNAME}/${OCI_REGISTRY_PROJECT_IMAGES}/${OPERATOR_NAME}:${VERSION}-${ARCH}");\
+	# Merge the SBOM with the metadata for the operator\
+	jq -s '{"metadata":{"component":{"description":"'"$$IMAGE_NAME. $$IMAGE_DESCRIPTION"'","supplier":{"name":"Stackable GmbH","url":["https://stackable.tech/"]},"author":"Stackable GmbH","purl":"'"$$PURL"'","publisher":"Stackable GmbH"}}} * .[0]' sbom.json > sbom.merged.json;\
+	# Attest the SBOM to the image\
+	cosign attest -y --predicate sbom.merged.json --type cyclonedx "${OCI_REGISTRY_HOSTNAME}/${OCI_REGISTRY_PROJECT_IMAGES}/${OPERATOR_NAME}@$$REPO_DIGEST_OF_IMAGE"
+
+# This assumes "${DOCKER_REPO}/${ORGANIZATION}/${OPERATOR_NAME}:${VERSION}-amd64 and "${DOCKER_REPO}/${ORGANIZATION}/${OPERATOR_NAME}:${VERSION}-arm64 are build and pushed
+docker-manifest-list-build:
+	docker manifest create "${DOCKER_REPO}/${ORGANIZATION}/${OPERATOR_NAME}:${VERSION}" --amend "${DOCKER_REPO}/${ORGANIZATION}/${OPERATOR_NAME}:${VERSION}-amd64" --amend "${DOCKER_REPO}/${ORGANIZATION}/${OPERATOR_NAME}:${VERSION}-arm64"
+	docker manifest create "${OCI_REGISTRY_HOSTNAME}/${OCI_REGISTRY_PROJECT_IMAGES}/${OPERATOR_NAME}:${VERSION}" --amend "${OCI_REGISTRY_HOSTNAME}/${OCI_REGISTRY_PROJECT_IMAGES}/${OPERATOR_NAME}:${VERSION}-amd64" --amend "${OCI_REGISTRY_HOSTNAME}/${OCI_REGISTRY_PROJECT_IMAGES}/${OPERATOR_NAME}:${VERSION}-arm64"
+
+docker-manifest-list-publish:
+	# Push to Nexus
+	echo "${NEXUS_PASSWORD}" | docker login --username github --password-stdin "${DOCKER_REPO}"
+	# `docker manifest push` directly returns the digest of the manifest list
+	# As it is an experimental feature, this might change in the future
+	# Further reading: https://docs.docker.com/reference/cli/docker/manifest/push/
+	DIGEST_NEXUS=$$(docker manifest push "${DOCKER_REPO}/${ORGANIZATION}/${OPERATOR_NAME}:${VERSION}");\
+	# Refer to image via its digest (oci.stackable.tech/sdp/airflow@sha256:0a1b2c...)\
+	# This generates a signature and publishes it to the registry, next to the image\
+	# Uses the keyless signing flow with Github Actions as identity provider\
+	cosign sign -y "${DOCKER_REPO}/${ORGANIZATION}/${OPERATOR_NAME}:${VERSION}@$$DIGEST_NEXUS"
+
+	# Push to Harbor
+	# We need to use "value" here to prevent the variable from being recursively expanded by make (username contains a dollar sign, since it's a Harbor bot)
+	docker login --username '${value OCI_REGISTRY_SDP_USERNAME}' --password '${OCI_REGISTRY_SDP_PASSWORD}' '${OCI_REGISTRY_HOSTNAME}'
+	DIGEST_HARBOR=$$(docker manifest push "${OCI_REGISTRY_HOSTNAME}/${OCI_REGISTRY_PROJECT_IMAGES}/${OPERATOR_NAME}:${VERSION}");\
+	# Refer to image via its digest (oci.stackable.tech/sdp/airflow@sha256:0a1b2c...);\
+	# This generates a signature and publishes it to the registry, next to the image\
+	# Uses the keyless signing flow with Github Actions as identity provider\
+	cosign sign -y "${OCI_REGISTRY_HOSTNAME}/${OCI_REGISTRY_PROJECT_IMAGES}/${OPERATOR_NAME}:${VERSION}@$$DIGEST_HARBOR"
 
 # TODO remove if not used/needed
 docker: docker-build docker-publish
@@ -40,8 +118,25 @@ print-docker-tag:
 	@echo "${DOCKER_REPO}/${ORGANIZATION}/${OPERATOR_NAME}:${VERSION}"
 
 helm-publish:
+	# Push to Nexus
 	curl --fail -u "github:${NEXUS_PASSWORD}" --upload-file "${HELM_CHART_ARTIFACT}" "${HELM_REPO}/"
 
+	# Push to Harbor
+	# We need to use "value" here to prevent the variable from being recursively expanded by make (username contains a dollar sign, since it's a Harbor bot)
+	helm registry login --username '${value OCI_REGISTRY_SDP_CHARTS_USERNAME}' --password '${OCI_REGISTRY_SDP_CHARTS_PASSWORD}' '${OCI_REGISTRY_HOSTNAME}'
+	# Obtain the digest of the pushed artifact from the output of `helm push`, because signing by tag is deprecated and will be removed from cosign in the future\
+	HELM_OUTPUT=$$(helm push '${HELM_CHART_ARTIFACT}' 'oci://${OCI_REGISTRY_HOSTNAME}/${OCI_REGISTRY_PROJECT_CHARTS}' 2>&1);\
+	REPO_DIGEST_OF_ARTIFACT=$$(echo "$$HELM_OUTPUT" | awk '/^Digest: sha256:[0-9a-f]{64}$$/ { print $$2 }');\
+	if [ -z "$$REPO_DIGEST_OF_ARTIFACT" ]; then\
+		echo 'Could not find repo digest for helm chart: ${HELM_CHART_NAME}';\
+		exit 1;\
+	fi;\
+	# Login to Harbor, needed for cosign to be able to push the signature for the Helm chart\
+	docker login --username '${value OCI_REGISTRY_SDP_CHARTS_USERNAME}' --password '${OCI_REGISTRY_SDP_CHARTS_PASSWORD}' '${OCI_REGISTRY_HOSTNAME}';\
+	# This generates a signature and publishes it to the registry, next to the chart artifact\
+	# Uses the keyless signing flow with Github Actions as identity provider\
+	cosign sign -y "${OCI_REGISTRY_HOSTNAME}/${OCI_REGISTRY_PROJECT_CHARTS}/${HELM_CHART_NAME}@$$REPO_DIGEST_OF_ARTIFACT"
+
 helm-package:
 	mkdir -p target/helm && helm package --destination target/helm deploy/helm/${OPERATOR_NAME}
 
@@ -62,9 +157,9 @@ config:
 		cp -r deploy/config-spec/* "deploy/helm/${OPERATOR_NAME}/configs";\
 	fi
 
-# crds:
-# 	mkdir -p deploy/helm/"${OPERATOR_NAME}"/crds
-# 	cargo run --bin "${OPERATOR_NAME}" -- crd | yq eval '.metadata.annotations["helm.sh/resource-policy"]="keep"' - > "deploy/helm/${OPERATOR_NAME}/crds/crds.yaml"
+#crds:
+#	mkdir -p deploy/helm/"${OPERATOR_NAME}"/crds
+#	cargo run --bin stackable-"${OPERATOR_NAME}" -- crd | yq eval '.metadata.annotations["helm.sh/resource-policy"]="keep"' - > "deploy/helm/${OPERATOR_NAME}/crds/crds.yaml"
 
 chart-lint: compile-chart
 	docker run -it -v $(shell pwd):/build/helm-charts -w /build/helm-charts quay.io/helmpack/chart-testing:v3.5.0  ct lint --config deploy/helm/ct.yaml
@@ -72,19 +167,31 @@ chart-lint: compile-chart
 clean: chart-clean
 	cargo clean
 	docker rmi --force "${DOCKER_REPO}/${ORGANIZATION}/${OPERATOR_NAME}:${VERSION}"
+	docker rmi --force '${OCI_REGISTRY_HOSTNAME}/${OCI_REGISTRY_PROJECT_IMAGES}/${OPERATOR_NAME}:${VERSION}'
 
 regenerate-charts: chart-clean compile-chart
 
-# The explicit '--extra-experimental-features flakes' parameter was added,
-# because the command requires Flakes to be enabled, but most non-Nix users
-# don't enable them via the global nix rc file.
 regenerate-nix:
-	nix run --extra-experimental-features flakes -f . regenerateNixLockfiles
+	nix run --extra-experimental-features "nix-command flakes" -f . regenerateNixLockfiles
 
 build: regenerate-charts regenerate-nix helm-package docker-build
 
+# This target is used by the CI
+# It doesn't make use of any nix dependencies and thus aviods building the
+# operator unnecessarily often.
+build-ci: regenerate-charts helm-package docker-build
+
 publish: docker-publish helm-publish
 
-run-dev:
+check-nix:
+	@which nix || (echo "Error: 'nix' is not installed. Please install it to proceed."; exit 1)
+
+check-kubernetes:
+	@kubectl cluster-info > /dev/null 2>&1 || (echo "Error: Kubernetes is not running or kubectl is not properly configured."; exit 1)
+
+run-dev: check-nix check-kubernetes
 	kubectl apply -f deploy/stackable-operators-ns.yaml
-	nix run -f. tilt -- up --port 5480 --namespace stackable-operators
+	nix run --extra-experimental-features "nix-command flakes" -f. tilt -- up --port 5480 --namespace stackable-operators
+
+stop-dev: check-nix check-kubernetes
+	nix run --extra-experimental-features "nix-command flakes" -f. tilt -- down