Create 'miktex' user in entrypoint.sh

Dockerfile

@@ -1,25 +1,35 @@
-FROM ubuntu:xenial
+FROM ubuntu:bionic
 
-LABEL Description="Dockerized MiKTeX, Ubuntu 16.04" Vendor="Christian Schenk" Version="2.9.6628"
-
-RUN apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys D6BC243565B2087BC3F897C9277A7293F59E4889
-RUN echo "deb http://miktex.org/download/ubuntu xenial universe" | tee /etc/apt/sources.list.d/miktex.list
+LABEL Description="Dockerized MiKTeX, Ubuntu 18.04" Vendor="Christian Schenk" Version="2.9.6970"
 
 RUN    apt-get update \
     && apt-get install -y --no-install-recommends \
            apt-transport-https \
-	   ca-certificates
+           ca-certificates \
+           dirmngr \
+           ghostscript \
+           gnupg \
+           gosu \
+           make \
+           perl
+
+RUN apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys D6BC243565B2087BC3F897C9277A7293F59E4889
+RUN echo "deb http://miktex.org/download/ubuntu bionic universe" | tee /etc/apt/sources.list.d/miktex.list
 
 RUN    apt-get update \
     && apt-get install -y --no-install-recommends \
-	   miktex \
-	   perl
+           miktex
 
-RUN useradd -md /miktex miktex
-USER miktex
+RUN    miktexsetup finish \
+    && initexmf --admin --set-config-value=[MPM]AutoInstall=1 \
+    && mpm --admin --update-db \
+    && mpm --admin \
+           --install amsfonts \
+           --install biber-linux-x86_64
 
-RUN miktexsetup finish
-RUN initexmf --set-config-value=[MPM]AutoInstall=1
-RUN mpm --install amsfonts
+COPY entrypoint.sh /
+ENTRYPOINT ["/entrypoint.sh"]
 
 WORKDIR /miktex/work
+
+CMD ["bash"]

README.md

@@ -24,6 +24,9 @@ configured to install missing files in the container directory
 `/miktex/.miktex`.  It is recommended that you mount this directory to
 a Docker volume.
 
+You should specify a user by setting the container environment
+variables `MIKTEX_GID` and `MIKTEX_UID`.
+
 ### Example
 
 First, create a Docker volume named `miktex`:
@@ -39,5 +42,7 @@ directory, you can run `pdflatex` as follows:
     docker run -ti \
       -v miktex:/miktex/.miktex \
       -v `pwd`:/miktex/work \
+      -e MIKTEX_GID=`id -g` \
+      -e MIKTEX_UID=`id -u` \
       miktex/miktex \
       pdflatex main.tex

entrypoint.sh

@@ -0,0 +1,12 @@
+#!/bin/sh
+
+MIKTEX_GID=${MIKTEX_GID:-1001}
+MIKTEX_UID=${MIKTEX_UID:-1001}
+
+groupadd -g $MIKTEX_GID -o miktex
+useradd --shell /bin/bash -u $MIKTEX_UID -g $MIKTEX_GID -o -c "" -Md /miktex miktex
+
+chown miktex:miktex /miktex
+chown miktex:miktex /miktex/work
+
+exec gosu miktex "$@"