diff --git a/.github/workflows/appstore-build-publish.yml b/.github/workflows/appstore-build-publish.yml
new file mode 100644
index 0000000..2f5c2c2
--- /dev/null
+++ b/.github/workflows/appstore-build-publish.yml
@@ -0,0 +1,200 @@
+# This workflow is provided via the organization template repository
+#
+# https://github.com/nextcloud/.github
+# https://docs.github.com/en/actions/learn-github-actions/sharing-workflows-with-your-organization
+#
+# SPDX-FileCopyrightText: 2021-2024 Nextcloud GmbH and Nextcloud contributors
+# SPDX-License-Identifier: MIT
+
+name: Build and publish app release
+
+on:
+  release:
+    types: [published]
+
+permissions:
+  contents: write
+
+jobs:
+  build_and_publish:
+    runs-on: ubuntu-latest
+
+    # Only allowed to be run on nextcloud-releases repositories
+    if: ${{ github.repository_owner == 'nextcloud-releases' }}
+
+    steps:
+      - name: Check actor permission
+        uses: skjnldsv/check-actor-permission@69e92a3c4711150929bca9fcf34448c5bf5526e7 # v3.0
+        with:
+          require: write
+
+      - name: Set app env
+        run: |
+          # Split and keep last
+          echo "APP_NAME=${GITHUB_REPOSITORY##*/}" >> $GITHUB_ENV
+          echo "APP_VERSION=${GITHUB_REF##*/}" >> $GITHUB_ENV
+
+      - name: Checkout
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        with:
+          persist-credentials: false
+          path: ${{ env.APP_NAME }}
+
+      - name: Get app version number
+        id: app-version
+        uses: skjnldsv/xpath-action@f5b036e9d973f42c86324833fd00be90665fbf77 # v1.0.0
+        with:
+          filename: ${{ env.APP_NAME }}/appinfo/info.xml
+          expression: "//info//version/text()"
+
+      - name: Validate app version against tag
+        run: |
+          [ "${{ env.APP_VERSION }}" = "v${{ fromJSON(steps.app-version.outputs.result).version }}" ]
+
+      - name: Get appinfo data
+        id: appinfo
+        uses: skjnldsv/xpath-action@f5b036e9d973f42c86324833fd00be90665fbf77 # v1.0.0
+        with:
+          filename: ${{ env.APP_NAME }}/appinfo/info.xml
+          expression: "//info//dependencies//nextcloud/@min-version"
+
+      - name: Read package.json node and npm engines version
+        uses: skjnldsv/read-package-engines-version-actions@06d6baf7d8f41934ab630e97d9e6c0bc9c9ac5e4 # v3
+        id: versions
+        # Continue if no package.json
+        continue-on-error: true
+        with:
+          path: ${{ env.APP_NAME }}
+          fallbackNode: '^24'
+          fallbackNpm: '^11.3'
+
+      - name: Set up node ${{ steps.versions.outputs.nodeVersion }}
+        # Skip if no package.json
+        if: ${{ steps.versions.outputs.nodeVersion }}
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
+        with:
+          node-version: ${{ steps.versions.outputs.nodeVersion }}
+          package-manager-cache: false
+
+      - name: Set up npm ${{ steps.versions.outputs.npmVersion }}
+        # Skip if no package.json
+        if: ${{ steps.versions.outputs.npmVersion }}
+        run: npm i -g 'npm@${{ steps.versions.outputs.npmVersion }}'
+
+      - name: Get php version
+        id: php-versions
+        uses: icewind1991/nextcloud-version-matrix@8a7bac6300b2f0f3100088b297995a229558ddba # v1.3.2
+        with:
+          filename: ${{ env.APP_NAME }}/appinfo/info.xml
+
+      - name: Set up php ${{ steps.php-versions.outputs.php-min }}
+        uses: shivammathur/setup-php@f3e473d116dcccaddc5834248c87452386958240 # 2.37.2
+        with:
+          php-version: ${{ steps.php-versions.outputs.php-min }}
+          coverage: none
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Check composer.json
+        id: check_composer
+        uses: andstor/file-existence-action@558493d6c74bf472d87c84eab196434afc2fa029 # v3.1.0
+        with:
+          files: "${{ env.APP_NAME }}/composer.json"
+
+      - name: Install composer dependencies
+        if: steps.check_composer.outputs.files_exists == 'true'
+        run: |
+          cd ${{ env.APP_NAME }}
+          composer install --no-dev
+
+      - name: Build ${{ env.APP_NAME }}
+        # Skip if no package.json
+        if: ${{ steps.versions.outputs.nodeVersion }}
+        env:
+          CYPRESS_INSTALL_BINARY: 0
+        run: |
+          cd ${{ env.APP_NAME }}
+          npm ci
+          npm run build --if-present
+
+      - name: Check Krankerl config
+        id: krankerl
+        uses: andstor/file-existence-action@558493d6c74bf472d87c84eab196434afc2fa029 # v3.1.0
+        with:
+          files: ${{ env.APP_NAME }}/krankerl.toml
+
+      - name: Install Krankerl
+        if: steps.krankerl.outputs.files_exists == 'true'
+        run: |
+          wget https://github.com/ChristophWurst/krankerl/releases/download/v0.14.0/krankerl_0.14.0_amd64.deb
+          sudo dpkg -i krankerl_0.14.0_amd64.deb
+
+      - name: Package ${{ env.APP_NAME }} ${{ env.APP_VERSION }} with krankerl
+        if: steps.krankerl.outputs.files_exists == 'true'
+        run: |
+          cd ${{ env.APP_NAME }}
+          krankerl package
+
+      - name: Package ${{ env.APP_NAME }} ${{ env.APP_VERSION }} with makefile
+        if: steps.krankerl.outputs.files_exists != 'true'
+        run: |
+          cd ${{ env.APP_NAME }}
+          make appstore
+
+      - name: Check server download link for ${{ fromJSON(steps.appinfo.outputs.result).nextcloud.min-version }}
+        run: |
+          NCVERSION='${{ fromJSON(steps.appinfo.outputs.result).nextcloud.min-version }}'
+          DOWNLOAD_URL=$(curl -s "https://updates.nextcloud.com/updater_server/latest?channel=beta&version=$NCVERSION" | jq -r '.downloads.zip[0]')
+          echo "DOWNLOAD_URL=$DOWNLOAD_URL" >> $GITHUB_ENV
+
+      - name: Download server ${{ fromJSON(steps.appinfo.outputs.result).nextcloud.min-version }}
+        continue-on-error: true
+        id: server-download
+        if: ${{ env.DOWNLOAD_URL != 'null' }}
+        run: |
+          echo "Downloading release tarball from $DOWNLOAD_URL"
+          wget $DOWNLOAD_URL -O nextcloud.zip
+          unzip nextcloud.zip
+
+      - name: Checkout server master fallback
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        if: ${{ steps.server-download.outcome != 'success' }}
+        with:
+          persist-credentials: false
+          submodules: true
+          repository: nextcloud/server
+          path: nextcloud
+
+
+      - name: Sign app
+        run: |
+          # Extracting release
+          cd ${{ env.APP_NAME }}/build/artifacts
+          tar -xvf ${{ env.APP_NAME }}.tar.gz
+          cd ../../../
+          # Setting up keys
+          echo '${{ secrets.APP_PRIVATE_KEY }}' > ${{ env.APP_NAME }}.key
+          wget --quiet "https://github.com/nextcloud/app-certificate-requests/raw/master/${{ env.APP_NAME }}/${{ env.APP_NAME }}.crt"
+          # Signing
+          php nextcloud/occ integrity:sign-app --privateKey=../${{ env.APP_NAME }}.key --certificate=../${{ env.APP_NAME }}.crt --path=../${{ env.APP_NAME }}/build/artifacts/${{ env.APP_NAME }}
+          # Rebuilding archive
+          cd ${{ env.APP_NAME }}/build/artifacts
+          tar -zcvf ${{ env.APP_NAME }}.tar.gz ${{ env.APP_NAME }}
+
+      - name: Attach tarball to github release
+        uses: svenstaro/upload-release-action@29e53e917877a24fad85510ded594ab3c9ca12de # 2.11.5
+        id: attach_to_release
+        with:
+          repo_token: ${{ secrets.GITHUB_TOKEN }}
+          file: ${{ env.APP_NAME }}/build/artifacts/${{ env.APP_NAME }}.tar.gz
+          asset_name: ${{ env.APP_NAME }}-${{ env.APP_VERSION }}.tar.gz
+          tag: ${{ github.ref }}
+          overwrite: true
+
+      - name: Upload app to Nextcloud appstore
+        uses: nextcloud-releases/nextcloud-appstore-push-action@a011fe619bcf6e77ddebc96f9908e1af4071b9c1 # v1.0.3
+        with:
+          app_name: ${{ env.APP_NAME }}
+          appstore_token: ${{ secrets.APPSTORE_TOKEN }}
+          download_url: ${{ steps.attach_to_release.outputs.browser_download_url }}
+          app_private_key: ${{ secrets.APP_PRIVATE_KEY }}
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..e5d39a4
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,73 @@
+# SPDX-FileCopyrightText: 2026 Nextcloud GmbH and Nextcloud contributors
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+app_name=integration_davc
+
+project_dir=$(CURDIR)
+build_dir=$(CURDIR)/build/artifacts
+appstore_dir=$(build_dir)/$(app_name)
+package_name=$(build_dir)/$(app_name).tar.gz
+
+# Tools (override on the command line if needed, e.g. `make composer-install COMPOSER=composer2`)
+COMPOSER=composer
+NPM=npm
+
+.PHONY: all
+all: build
+
+# Install all dependencies and build the production frontend assets.
+.PHONY: build
+build: composer-install build-js-production
+
+# PHP runtime dependencies only (no dev tooling ends up in the package).
+.PHONY: composer-install
+composer-install:
+	$(COMPOSER) install --no-dev --prefer-dist --optimize-autoloader
+
+# Compile the frontend bundle into js/.
+.PHONY: build-js-production
+build-js-production:
+	$(NPM) ci
+	$(NPM) run build --if-present
+
+# Remove all build output.
+.PHONY: clean
+clean:
+	rm -rf $(build_dir)
+
+# Assemble a clean copy of the app and package it for the Nextcloud App Store.
+# NOTE: this only packages what is already present in the working tree. Run
+# `make build` (or the CI build steps) first so js/ and vendor/ are populated.
+.PHONY: appstore
+appstore: clean
+	mkdir -p $(appstore_dir)
+	rsync -a \
+	  --exclude='/build' \
+	  --exclude='/.git' \
+	  --exclude='/.github' \
+	  --exclude='/.tx' \
+	  --exclude='/.ideas' \
+	  --exclude='/.vscode' \
+	  --exclude='/node_modules' \
+	  --exclude='/src' \
+	  --exclude='/tests' \
+	  --exclude='/docs' \
+	  --exclude='/.phpunit.cache' \
+	  --exclude='*.cache' \
+	  --exclude='*.log' \
+	  --exclude='*.log.*' \
+	  --exclude='/renovate.json' \
+	  --exclude='/.l10nignore' \
+	  --exclude='/.gitignore' \
+	  --exclude='/eslint.config.mjs' \
+	  --exclude='/stylelint.config.js' \
+	  --exclude='/rspack.config.js' \
+	  --exclude='/tsconfig.json' \
+	  --exclude='/.php-cs-fixer.dist.php' \
+	  --exclude='/package.json' \
+	  --exclude='/package-lock.json' \
+	  --exclude='/composer.json' \
+	  --exclude='/composer.lock' \
+	  --exclude='/Makefile' \
+	  $(project_dir)/ $(appstore_dir)/
+	tar -czf $(package_name) -C $(build_dir) $(app_name)