Add formatting docker image

latex/fmt/Dockerfile

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+FROM alpine
+
+WORKDIR /root
+
+RUN apk add texlive-binextra perl-file-homedir perl-yaml-tiny
+
+COPY ./format.sh /root/
+RUN chmod +x /root/format.sh
+
+CMD [ "/root/format.sh" ]

latex/fmt/build-image.sh

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+#!/bin/sh
+
+set -e
+
+echo "Build will be tagged with $1"
+echo "Build directory is $(pwd)"
+
+OLD_IMG=$(docker image ls -q "$1")
+docker buildx build . -t "$1"
+
+echo "Build complete, starting upload..."
+docker push "$1"
+
+if [ -n "$OLD_IMG" ]; then
+	if [ "$OLD_IMG" != "$(docker image ls -q "$1")" ]; then
+		echo "New build uploaded, removing old image, id: $OLD_IMG"
+		docker image rmi -f "$OLD_IMG" || true
+        echo "Exit status: $?"
+	fi
+fi

latex/fmt/format.sh

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+#!/bin/sh
+
+if [ ! "$1" == "" ]; then
+	cd $1
+fi
+
+echo "Formatting directory $(pwd)"
+
+files=$(find . -type f | grep "\.tex")
+
+idx=1
+total=$(echo "$files" | wc -l)
+for file in $files; do
+    echo "Processing file $idx / $total"
+	latexindent -s -w $file
+    ((idx++))
+done