diff --git a/.github/ISSUE_TEMPLATE/normal-issue.md b/.github/ISSUE_TEMPLATE/normal-issue.md
new file mode 100644
index 00000000..a518ec71
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/normal-issue.md
@@ -0,0 +1,16 @@
+---
+name: Normal issue
+about: This is just a normal empty issue with a simple checklist
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+## Issue checklist
+
+This is a simple checklist of things to bear in mind when creating a new issue.
+
+- [ ] Describe the use-case, as far is possible. For instance, using the pattern "As a XXXX, I would like XXXX to be able to do XXXX" helps to identify the feature as well as the problem it is intended to address.
+- [ ] Indicate an approximate level of importance and urgency.
+- [ ] Indicate if there is a known work-around until such time as the issue has been implemented.
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 4508652b..ecd7d395 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -292,6 +292,8 @@ jobs:
     env:
       NEXUS_PASSWORD: ${{ secrets.NEXUS_PASSWORD }}
       HELM_REPO: ${{ needs.select_helm_repo.outputs.helm_repository }}
+      OCI_REGISTRY_PASSWORD: ${{ secrets.HARBOR_ROBOT_STACKABLE_GITHUB_ACTION_BUILD_SECRET }}
+      OCI_REGISTRY_USERNAME: "robot$stackable+github-action-build"
     if: needs.select_helm_repo.outputs.helm_repository != 'skip'
     outputs:
       IMAGE_TAG: ${{ steps.printtag.outputs.IMAGE_TAG }}
diff --git a/Makefile b/Makefile
index c997f2b0..fa4eed3e 100644
--- a/Makefile
+++ b/Makefile
@@ -15,8 +15,12 @@ VERSION := $(shell cargo metadata --format-version 1 | jq -r '.packages[] | sele
 
 DOCKER_REPO := docker.stackable.tech
 ORGANIZATION := stackable
+OCI_REGISTRY_HOSTNAME := oci.stackable.tech
+OCI_REGISTRY_PROJECT_IMAGES := ${ORGANIZATION}/images
+OCI_REGISTRY_PROJECT_CHARTS := ${ORGANIZATION}/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
@@ -27,8 +31,10 @@ render-readme:
 ## Docker related targets
 docker-build:
 	docker build --force-rm --build-arg VERSION=${VERSION} -t "${DOCKER_REPO}/${ORGANIZATION}/${OPERATOR_NAME}:${VERSION}" -f docker/Dockerfile .
+	docker tag "${DOCKER_REPO}/${ORGANIZATION}/${OPERATOR_NAME}:${VERSION}" "${OCI_REGISTRY_HOSTNAME}/${OCI_REGISTRY_PROJECT_IMAGES}/${OPERATOR_NAME}:${VERSION}"
 
 docker-publish:
+	# push to Nexus
 	echo "${NEXUS_PASSWORD}" | docker login --username github --password-stdin "${DOCKER_REPO}"
 	DOCKER_OUTPUT=$$(docker push --all-tags "${DOCKER_REPO}/${ORGANIZATION}/${OPERATOR_NAME}");\
 	# Obtain the digest of the pushed image from the output of `docker push`, because signing by tag is deprecated and will be removed from cosign in the future\
@@ -41,6 +47,20 @@ docker-publish:
 	# Uses the keyless signing flow with Github Actions as identity provider\
 	cosign sign -y ${DOCKER_REPO}/${ORGANIZATION}/${OPERATOR_NAME}:@$$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 '${value OCI_REGISTRY_USERNAME}' --password '${OCI_REGISTRY_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 "$$DOCKER_OUTPUT" | awk '/^${VERSION}: digest: sha256:[0-9a-f]{64} size: [0-9]+$$/ { print $$3 }');\
+	if [ -z "$$REPO_DIGEST_OF_IMAGE" ]; then\
+		echo 'Could not find repo digest for container image: ${DOCKER_REPO}/${ORGANIZATION}/${OPERATOR_NAME}:${VERSION}';\
+		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
+
 # TODO remove if not used/needed
 docker: docker-build docker-publish
 
@@ -48,8 +68,23 @@ 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 '${value OCI_REGISTRY_USERNAME}' --password '${OCI_REGISTRY_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;\
+	# 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}
 
@@ -80,6 +115,7 @@ 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