diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 247175d..27d5c73 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,21 +13,13 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
-env:
-  PUBLISH: ${{ github.event_name == 'push'
-               && (startsWith(github.ref, 'refs/tags/0')
-                   || startsWith(github.ref, 'refs/tags/1')
-                   || startsWith(github.ref, 'refs/tags/2')
-                   || startsWith(github.ref, 'refs/tags/3')
-                   || startsWith(github.ref, 'refs/tags/4')
-                   || startsWith(github.ref, 'refs/tags/5')
-                   || startsWith(github.ref, 'refs/tags/6')
-                   || startsWith(github.ref, 'refs/tags/7')
-                   || startsWith(github.ref, 'refs/tags/8')
-                   || startsWith(github.ref, 'refs/tags/9')) }}
-
 jobs:
-  docker:
+
+  ############
+  # Building #
+  ############
+
+  build:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
@@ -35,79 +27,154 @@ jobs:
           fetch-depth: 0
       - uses: docker/setup-buildx-action@v2
 
-      - uses: satackey/action-docker-layer-caching@v0.0.11
-        continue-on-error: true
-        if: ${{ env.PUBLISH != 'true' && github.ref != 'refs/heads/main' }}
-      - run: make docker.image no-cache=no tag=build-${{ github.run_number }}
-        if: ${{ env.PUBLISH != 'true' && github.ref != 'refs/heads/main' }}
+      - run: make docker.image no-cache=yes
+                  tag=build-${{ github.run_number }}
+
+      - run: make docker.tar to-file=image.tar
+                  tags=build-${{ github.run_number }}
+      - uses: actions/upload-artifact@v3
+        with:
+          name: image-${{ github.run_number }}
+          path: image.tar
+          retention-days: 1
+
 
-      - run: make docker.image no-cache=yes tag=build-${{ github.run_number }}
-        if: ${{ env.PUBLISH == 'true' || github.ref == 'refs/heads/main' }}
 
+
+  ###########
+  # Testing #
+  ###########
+
+  test:
+    needs: ["build"]
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
       - run: make npm.install
-      - run: make test.docker tag=build-${{ github.run_number }}
 
-      - name: Login to GitHub Container Registry
-        uses: docker/login-action@v2
+      - uses: actions/download-artifact@v3
         with:
-          registry: ghcr.io
-          username: ${{ github.repository_owner }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-        if: ${{ env.PUBLISH == 'true' }}
-      - name: Login to Quay.io
-        uses: docker/login-action@v2
+          name: image-${{ github.run_number }}
+      - run: make docker.untar from-file=image.tar
+
+      - run: make test.docker
+                  tag=build-${{ github.run_number }}
+
+
+
+
+  #############
+  # Releasing #
+  #############
+
+  release-docker:
+    name: Release Docker image
+    needs: ["build", "test"]
+    if: ${{ github.event_name == 'push'
+            && startsWith(github.ref, 'refs/tags/') }}
+    strategy:
+      fail-fast: false
+      matrix:
+        registry: ["docker.io", "ghcr.io", "quay.io"]
+    runs-on: ubuntu-latest
+    steps:
+      # Skip if this is fork and no credentials are provided.
+      - id: skip
+        run: echo ::set-output name=no::${{ !(
+               github.repository_owner != 'instrumentisto'
+               && ((matrix.registry == 'quay.io'
+                    && secrets.QUAYIO_ROBOT_USER == '')
+                || (matrix.registry == 'docker.io'
+                    && secrets.DOCKERHUB_BOT_USER == ''))
+             ) }}
+
+      - uses: actions/checkout@v3
+        if: ${{ steps.skip.outputs.no == 'true' }}
+
+      - name: Parse Docker image name from Git repository name
+        id: image
+        uses: actions-ecosystem/action-regex-match@v2
         with:
-          registry: quay.io
-          username: instrumentisto+bot
-          password: ${{ secrets.QUAYIO_ROBOT_TOKEN }}
-        if: ${{ env.PUBLISH == 'true' }}
-      - name: Login to Docker Hub
+          text: ${{ github.repository }}
+          regex: '^${{ github.repository_owner }}/(.+)-docker-image$'
+
+      - uses: actions/download-artifact@v3
+        with:
+          name: image-${{ github.run_number }}
+        if: ${{ steps.skip.outputs.no == 'true' }}
+      - run: make docker.untar from-file=image.tar
+        if: ${{ steps.skip.outputs.no == 'true' }}
+
+      - name: Login to ${{ matrix.registry }} container registry
         uses: docker/login-action@v2
         with:
-          username: instrumentistobot
-          password: ${{ secrets.DOCKERHUB_BOT_PASS }}
-        if: ${{ env.PUBLISH == 'true' }}
+          registry: ${{ matrix.registry }}
+          username: ${{ (matrix.registry == 'docker.io'
+                         && secrets.DOCKERHUB_BOT_USER)
+                     || (matrix.registry == 'quay.io'
+                         && secrets.QUAYIO_ROBOT_USER)
+                     || github.repository_owner }}
+          password: ${{ (matrix.registry == 'docker.io'
+                         && secrets.DOCKERHUB_BOT_PASS)
+                     || (matrix.registry == 'quay.io'
+                         && secrets.QUAYIO_ROBOT_TOKEN)
+                     || secrets.GITHUB_TOKEN }}
+        if: ${{ steps.skip.outputs.no == 'true' }}
 
-      - run: make docker.tags of=build-${{ github.run_number }}
-        if: ${{ env.PUBLISH == 'true' }}
+      - run: make docker.tags
+                  registries=${{ matrix.registry }}
+                  of=build-${{ github.run_number }}
+        if: ${{ steps.skip.outputs.no == 'true' }}
       - run: make docker.push
-        if: ${{ env.PUBLISH == 'true' }}
+                  registries=${{ matrix.registry }}
+        if: ${{ steps.skip.outputs.no == 'true' }}
 
       # On GitHub Container Registry README is automatically updated on pushes.
-      - name: Update README on Quay.io
+      - name: Update README on Docker Hub
         uses: christian-korneck/update-container-description-action@v1
-        env:
-          DOCKER_APIKEY: ${{ secrets.QUAYIO_API_TOKEN }}
         with:
-          provider: quay
-          destination_container_repo: quay.io/instrumentisto/pure-ftpd
+          provider: dockerhub
+          destination_container_repo: ${{ github.repository_owner }}/${{ steps.image.outputs.group1 }}
           readme_file: README.md
-        if: ${{ env.PUBLISH == 'true' }}
-      - name: Update README on Docker Hub
-        uses: christian-korneck/update-container-description-action@v1
         env:
-          DOCKER_USER: instrumentistobot
+          DOCKER_USER: ${{ secrets.DOCKERHUB_BOT_USER }}
           DOCKER_PASS: ${{ secrets.DOCKERHUB_BOT_PASS }}
+        if: ${{ steps.skip.outputs.no == 'true'
+                && matrix.registry == 'docker.io' }}
+      - name: Update README on Quay.io
+        uses: christian-korneck/update-container-description-action@v1
         with:
-          provider: dockerhub
-          destination_container_repo: instrumentisto/pure-ftpd
+          provider: quay
+          destination_container_repo: ${{ matrix.registry }}/${{ github.repository_owner }}/${{ steps.image.outputs.group1 }}
           readme_file: README.md
-        if: ${{ env.PUBLISH == 'true' }}
+        env:
+          DOCKER_APIKEY: ${{ secrets.QUAYIO_API_TOKEN }}
+        if: ${{ steps.skip.outputs.no == 'true'
+                && matrix.registry == 'quay.io' }}
+
+  release-github:
+    name: Release on GitHub
+    needs: ["release-docker"]
+    if: ${{ github.event_name == 'push'
+            && startsWith(github.ref, 'refs/tags/') }}
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
 
-      - name: Parse release version from Git tag
-        id: release
-        run: echo ::set-output name=VERSION::${GITHUB_REF#refs/tags/}
-        if: ${{ env.PUBLISH == 'true' }}
+      - name: Parse semver versions from Git tag
+        id: semver
+        uses: actions-ecosystem/action-regex-match@v2
+        with:
+          text: ${{ github.ref }}
+          regex: '^refs/tags/((([0-9]+)\.[0-9]+)\.[0-9]+-(.+))$'
       - name: Parse CHANGELOG link
         id: changelog
-        run: echo ::set-output name=LINK::https://github.com/${{ github.repository }}/blob/${{ steps.release.outputs.VERSION }}/CHANGELOG.md#$(sed -n '/^## \[${{ steps.release.outputs.VERSION }}\]/{s/^## \[\(.*\)\][^0-9]*\([0-9].*\)/\1--\2/;s/[^0-9a-z-]*//g;p;}' CHANGELOG.md)
-        if: ${{ env.PUBLISH == 'true' }}
-      - name: Release on GitHub
+        run: echo ::set-output
+                  name=LINK::https://github.com/${{ github.repository }}/blob/${{ steps.semver.outputs.group1 }}/CHANGELOG.md#$(sed -n '/^## \[${{ steps.semver.outputs.group1 }}\]/{s/^## \[\(.*\)\][^0-9]*\([0-9].*\)/\1--\2/;s/[^0-9a-z-]*//g;p;}' CHANGELOG.md)
+
+      - name: Create GitHub release
         uses: softprops/action-gh-release@v1
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
-          name: ${{ steps.release.outputs.VERSION }}
+          name: ${{ steps.semver.outputs.group1 }}
           body: |
             [Changelog](${{ steps.changelog.outputs.LINK }})
-        if: ${{ env.PUBLISH == 'true' }}
diff --git a/.gitignore b/.gitignore
index 3f4c570..117b113 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,7 +1,9 @@
 /.idea/
+/.vscode/
 /*.iml
 .DS_Store
 
+/.cache/
 /node_modules/
 /package-lock.json
 /yarn.lock
diff --git a/Makefile b/Makefile
index 5074eb0..f722458 100644
--- a/Makefile
+++ b/Makefile
@@ -24,9 +24,9 @@ BUILD_REV ?= $(strip \
 
 NAME := pure-ftpd
 OWNER := $(or $(GITHUB_REPOSITORY_OWNER),instrumentisto)
-NAMESPACES := $(OWNER) \
-              ghcr.io/$(OWNER) \
-              quay.io/$(OWNER)
+REGISTRIES := $(strip $(subst $(comma), ,\
+	$(shell grep -m1 'registry: \["' .github/workflows/ci.yml \
+	        | cut -d':' -f2 | tr -d '"][')))
 TAGS ?= $(PURE_FTPD_VER)-r$(BUILD_REV) \
         $(PURE_FTPD_VER) \
         $(strip $(shell echo $(PURE_FTPD_VER) | cut -d '.' -f1,2)) \
@@ -58,8 +58,8 @@ test: test.docker
 # Docker commands #
 ###################
 
-docker-namespaces = $(strip $(if $(call eq,$(namespaces),),\
-                            $(NAMESPACES),$(subst $(comma), ,$(namespaces))))
+docker-registries = $(strip $(if $(call eq,$(registries),),\
+                            $(REGISTRIES),$(subst $(comma), ,$(registries))))
 docker-tags = $(strip $(if $(call eq,$(tags),),\
                       $(TAGS),$(subst $(comma), ,$(tags))))
 
@@ -93,16 +93,16 @@ docker.image:
 #
 # Usage:
 #	make docker.push [tags=($(TAGS)|<docker-tag-1>[,<docker-tag-2>...])]
-#	                 [namespaces=($(NAMESPACES)|<prefix-1>[,<prefix-2>...])]
+#	                 [registries=($(REGISTRIES)|<prefix-1>[,<prefix-2>...])]
 
 docker.push:
 	$(foreach tag,$(subst $(comma), ,$(docker-tags)),\
-		$(foreach namespace,$(subst $(comma), ,$(docker-namespaces)),\
-			$(call docker.push.do,$(namespace),$(tag))))
+		$(foreach registry,$(subst $(comma), ,$(docker-registries)),\
+			$(call docker.push.do,$(registry),$(tag))))
 define docker.push.do
 	$(eval repo := $(strip $(1)))
 	$(eval tag := $(strip $(2)))
-	docker push $(repo)/$(NAME):$(tag)
+	docker push $(repo)/$(OWNER)/$(NAME):$(tag)
 endef
 
 
@@ -111,23 +111,47 @@ endef
 # Usage:
 #	make docker.tags [of=($(VERSION)|<docker-tag>)]
 #	                 [tags=($(TAGS)|<docker-tag-1>[,<docker-tag-2>...])]
-#	                 [namespaces=($(NAMESPACES)|<prefix-1>[,<prefix-2>...])]
+#	                 [registries=($(REGISTRIES)|<prefix-1>[,<prefix-2>...])]
 
 docker.tags:
 	$(foreach tag,$(subst $(comma), ,$(docker-tags)),\
-		$(foreach namespace,$(subst $(comma), ,$(docker-namespaces)),\
-			$(call docker.tags.do,$(or $(of),$(VERSION)),$(namespace),$(tag))))
+		$(foreach registry,$(subst $(comma), ,$(docker-registries)),\
+			$(call docker.tags.do,$(or $(of),$(VERSION)),$(registry),$(tag))))
 define docker.tags.do
 	$(eval from := $(strip $(1)))
 	$(eval repo := $(strip $(2)))
 	$(eval to := $(strip $(3)))
-	docker tag $(OWNER)/$(NAME):$(from) $(repo)/$(NAME):$(to)
+	docker tag $(OWNER)/$(NAME):$(from) $(repo)/$(OWNER)/$(NAME):$(to)
 endef
 
 
+# Save Docker images to a tarball file.
+#
+# Usage:
+#	make docker.tar [to-file=(.cache/image.tar|<file-path>)]
+#	                [tags=($(VERSION)|<docker-tag-1>[,<docker-tag-2>...])]
+
+docker-tar-file = $(or $(to-file),.cache/image.tar)
+
+docker.tar:
+	@mkdir -p $(dir $(docker-tar-file))
+	docker save -o $(docker-tar-file) \
+		$(foreach tag,$(subst $(comma), ,$(or $(tags),$(VERSION))),\
+			$(OWNER)/$(NAME):$(tag))
+
+
 docker.test: test.docker
 
 
+# Load Docker images from a tarball file.
+#
+# Usage:
+#	make docker.untar [from-file=(.cache/image.tar|<file-path>)]
+
+docker.untar:
+	docker load -i $(or $(from-file),.cache/image.tar)
+
+
 
 
 ####################
@@ -140,7 +164,7 @@ docker.test: test.docker
 #	https://github.com/bats-core/bats-core
 #
 # Usage:
-#	make test.docker [tag=($(VERSION)|<tag>)]
+#	make test.docker [tag=($(VERSION)|<docker-tag>)]
 
 test.docker:
 ifeq ($(wildcard node_modules/.bin/bats),)
@@ -201,7 +225,8 @@ endif
 ##################
 
 .PHONY: image push release tags test \
-        docker.image docker.push docker.tags docker.test \
+        docker.image docker.push docker.tags docker.tar docker.test \
+        docker.untar \
         git.release \
         npm.install \
         test.docker