Added a line to update the pacman repository database

frontend/scripts/docker-buildfiles/Dockerfile

@@ -1,5 +1,7 @@
 FROM archlinux/archlinux:base-devel
 
+RUN pacman -Syy 
+
 RUN pacman -Syu --needed --noconfirm git xdg-user-dirs
 
 # makepkg user and workdir
@@ -33,4 +35,4 @@ cargo install --force cargo-make && \
 cargo install --force duckscript_cli && \
 cargo make flowy_dev && \
 cargo make -p production-linux-x86 appflowy-linux
-CMD ["appflowy/frontend/app_flowy/product/0.0.2/linux/Release/AppFlowy/app_flowy"]
+CMD ["appflowy/frontend/app_flowy/product/0.0.2/linux/Release/AppFlowy/app_flowy"]