client: Dockerfiles: remote: root: use multi-stage

A single development stage ended up not being needed.

NOTE: `dfi` will still only pull the package artifact from the final image.

client/Dockerfiles/remote/root/Dockerfile.archlinux

@@ -15,7 +15,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <https://www.gnu.org/licenses/>.
 
-FROM archlinux:base-devel
+FROM archlinux:base-devel AS base-devel
 
 RUN pacman -Syu \
   git \
@@ -78,6 +78,22 @@ RUN sed -i -e '/^  qt6-webengine$/d' PKGBUILD
 # Do not build root debug package
 RUN sed -i "s/options=(\!lto)$/options=('\!debug' '\!lto')/" PKGBUILD
 
-RUN PACKAGER="https://gitea.com/EvergreenCrypto/docker-finance" makepkg -sci --noconfirm
+# Execute build
+RUN PACKAGER="https://gitea.com/EvergreenCrypto/docker-finance" makepkg -s --noconfirm
+
+#
+# Production stage
+#
+
+FROM archlinux:base
+
+COPY --from=base-devel /home/builder/root/root-*.pkg.tar.zst /root/
+
+RUN pacman -Syu \
+  gcc \
+  --noconfirm --disable-download-timeout
+
+WORKDIR /root
+RUN pacman -U root-*.pkg.tar.zst --noconfirm
 
 # vim: sw=2 sts=2 si ai et