diff --git a/Dockerfile b/Dockerfile
index 2737b0b..3fbad93 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,9 +1,27 @@
 ARG VERSION_PHP=8.3
 ARG VERSION_COMPOSER=lts
+ARG VERSION_GIT=2.52.0
 
 FROM composer:${VERSION_COMPOSER} AS comp
-FROM php:${VERSION_PHP}-apache
 
+# Get upstream
+FROM alpine/git:${VERSION_GIT} AS upstream
+ARG APP_GH_ADD_SHA=false
+ARG APP_GH_REF=refs/heads/develop
+ARG GIT_TREE=${APP_GH_REF##*/}
+ARG UPSTREAM_URL="https://github.com/librebooking/librebooking"
+WORKDIR /upstream
+RUN <<EORUN
+set -eux
+git clone ${UPSTREAM_URL} /upstream
+git checkout ${GIT_TREE}
+if [ "${APP_GH_ADD_SHA}" = "true" ]; then
+  git describe --tags --long > config/custom-version.txt
+fi
+rm -rf .git
+EORUN
+
+FROM php:${VERSION_PHP}-apache
 # Labels
 LABEL org.opencontainers.image.title="LibreBooking"
 LABEL org.opencontainers.image.description="LibreBooking as a container"
@@ -13,27 +31,24 @@ LABEL org.opencontainers.image.licenses="GPL-3.0"
 LABEL org.opencontainers.image.authors="colisee@hotmail.com"
 
 # Copy entrypoint scripts
-COPY --chmod=755 bin /usr/local/bin/
+COPY --chmod=0755 bin /usr/local/bin/
 
 # Create cron jobs
-COPY --chown=www-data:www-data --chmod=0755 lb-jobs-cron /config/
+COPY --chown=www-data:www-data --chmod=0755 \
+     lb-jobs-cron /config/
 
 # Copy composer
 COPY --from=comp /usr/bin/composer /usr/bin/composer
 
+# Copy Librebooking
+COPY --from=upstream \
+     --chown=www-data:root --chmod=0775 \
+     /upstream/ /var/www/html/
+
 # Update and install required debian packages
 ENV DEBIAN_FRONTEND=noninteractive
-ARG APP_GH_REF
-ARG APP_GH_ADD_SHA=false
-# hadolint ignore=DL3008 # 'Pin versions in apt get install'
-COPY setup.sh /usr/local/bin/setup.sh
-RUN <<EORUN
-set -xeu
-export APP_GH_REF="${APP_GH_REF}"
-export APP_GH_ADD_SHA="${APP_GH_ADD_SHA}"
-chmod +x /usr/local/bin/setup.sh
-/usr/local/bin/setup.sh
-rm /usr/local/bin/setup.sh
+RUN --mount=type=bind,source=setup.sh,target=/tmp/setup.sh <<EORUN
+bash /tmp/setup.sh
 EORUN
 
 # Environment
diff --git a/setup.sh b/setup.sh
index 2fab56e..8462b8b 100644
--- a/setup.sh
+++ b/setup.sh
@@ -13,7 +13,6 @@ apt-get update
 apt-get upgrade --yes
 apt-get install --yes --no-install-recommends \
   cron \
-  git \
   libjpeg-dev \
   libldap-dev \
   libpng-dev \
@@ -50,36 +49,6 @@ sed \
   -i /etc/apache2/sites-available/000-default.conf \
   -e 's/<VirtualHost *:80>/<VirtualHost *:8080>/'
 
-set -xeuo pipefail
-LB_TARBALL_URL="https://api.github.com/repos/LibreBooking/librebooking/tarball/${APP_GH_REF}"
-curl \
-  --fail \
-  --silent \
-  --location "${LB_TARBALL_URL}" |
-  tar --extract --gzip --directory=/var/www/html --strip-components=1
-if [ "${APP_GH_ADD_SHA}" = "true" ]; then
-  LB_SHORT_SHA=""
-  # TARBALL_FILENAME will be like the result of a `git describe` For
-  # example: 'LibreBooking-librebooking-v4.1.0-126-g6cc8a4c.tar.gz' where
-  # 'g6cc8a4c' is the short SHA prefixed with 'g'. So the short SHA is
-  # '6cc8a4c'
-  TARBALL_FILENAME=$(
-    curl \
-      --head \
-      --fail \
-      --silent \
-      --show-error \
-      --location "${LB_TARBALL_URL}" |
-      sed -nE 's/.*filename="?([^";]+)"?.*/\1/p'
-  )
-  LB_SHORT_SHA=$(echo "${TARBALL_FILENAME}" | sed -E 's/.*-g([0-9a-f]+)\.tar\.gz/\1/')
-  if [ -n "${LB_SHORT_SHA}" ]; then
-    printf '%s\n' "${LB_SHORT_SHA}" >/var/www/html/config/version-suffix.txt
-  else
-    echo "ERROR determining the LB_SHORT_SHA value from TARBALL_FILENAME ${TARBALL_FILENAME}" >&2
-    exit 1
-  fi
-fi
 if [ -f /var/www/html/composer.json ]; then
   sed \
     -i /var/www/html/composer.json \
@@ -96,19 +65,17 @@ if ! [ -d /var/www/html/tpl_c ]; then
 fi
 mkdir /var/www/html/Web/uploads/reservation
 
-chown www-data:root \
+chown --recursive www-data:root \
   /var/www/html/config \
+  /var/www/html/plugins \
   /var/www/html/tpl_c \
   /var/www/html/Web/uploads/images \
   /var/www/html/Web/uploads/reservation \
   /usr/local/etc/php/conf.d/librebooking.ini
-chmod g+rwx \
+chmod --recursive g+rwx \
   /var/www/html/config \
+  /var/www/html/plugins \
   /var/www/html/tpl_c \
   /var/www/html/Web/uploads/images \
   /var/www/html/Web/uploads/reservation \
   /usr/local/etc/php/conf.d/librebooking.ini
-chown --recursive www-data:root \
-  /var/www/html/plugins
-chmod --recursive g+rwx \
-  /var/www/html/plugins