Initial commit of new flow

docker/latex/Dockerfile

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+FROM pandoc/latex:2.18.0.0 AS basic
+
+RUN apk add --no-cache texlive=20210325-r4
+
+# texlive is huuuge and we don't want to keep re-downloading it; don't warn on the repeated RUN command
+# hadolint ignore=DL3059
+RUN tlmgr update --self && \
+    tlmgr install tikz-cd && \
+    tlmgr install mdframed && \
+    tlmgr install mathtools && \
+    # Dependencies of mdframed \
+    tlmgr install zref && \
+    tlmgr install needspace
+
+FROM basic AS build
+
+COPY "build.sh" "/build.sh"
+
+RUN mkdir /sentinels && \
+    chmod a+rwx /sentinels && \
+    chmod +x /build.sh && \
+    addgroup -S pdftex && adduser -S pdftex -G pdftex
+
+USER pdftex
+
+WORKDIR /home/pdftex
+
+ENTRYPOINT []