refactor(docker): Build docker using prebuilt dependencies

Dockerfile

@@ -1,14 +1,19 @@
 ARG sile_tag=master
 FROM archlinux AS sile-base
 
-RUN pacman --needed --noconfirm -Syyuq && yes | pacman -Sccq
+# Setup Alerque's hosted Arch repository with prebuilt dependencies
+RUN pacman-key --init && pacman-key --populate
+RUN sed -i -e '/^.community/{n;n;s!^!\n\[alerque\]\nServer = https://arch.alerque.com/$arch\n!}' /etc/pacman.conf
+RUN pacman-key --recv-keys 63CC496475267693 && pacman-key --lsign-key 63CC496475267693
 
-COPY build-aux/docker-yay-runner.sh /usr/local/bin
-RUN docker-yay-runner.sh "--noconfirm --asexplicit -Sq fontconfig harfbuzz icu lua lua-{cassowary,cosmo,cliargs,expat,filesystem,linenoise,lpeg,luaepnf,penlight,repl,sec,socket,stdlib,vstruct,zlib} ttf-gentium-plus"
+RUN pacman --needed --noconfirm -Syuq && yes | pacman -Sccq
+
+# Installing and removing pre-packaged sile bootstraps the system dependencies
+RUN pacman --needed --noconfirm -Syq sile && yes | pacman -Sccq && pacman --noconfirm -Rq sile
 
 FROM sile-base AS sile-builder
 
-RUN pacman --needed --noconfirm -Syyuq && pacman --needed --noconfirm -Sq git base-devel poppler && yes | pacman -Sccq
+RUN pacman --needed --noconfirm -Syq git base-devel poppler
 
 COPY ./ /src
 WORKDIR /src
@@ -19,7 +24,9 @@ RUN git clean -dxf ||:
 RUN git fetch --unshallow ||:
 RUN git fetch --tags ||:
 
-RUN ./bootstrap.sh && ./configure --with-system-luarocks && make
+RUN ./bootstrap.sh
+RUN ./configure --with-system-luarocks
+RUN make
 RUN make install DESTDIR=/pkgdir
 
 FROM sile-base AS sile

Makefile.am

@@ -327,7 +327,7 @@ endif
 CLEANFILES = $(bin_SCRIPTS) $(dist_man_MANS) $(DEPFILES) $(ACTUALS) $(TESTPDFS)
 
 .PHONY: docker
-docker: Dockerfile build-aux/docker-entrypoint.sh build-aux/docker-yay-runner.sh
+docker: Dockerfile build-aux/docker-entrypoint.sh
 	docker build --tag siletypesetter/sile:HEAD ./
 
 gource.webm: