Use simplified entrypoint script

.dockerignore

@@ -3,4 +3,4 @@
 !public
 !package.json
 !package-lock.json
-!run.sh
+!docker-entrypoint.sh

Dockerfile

@@ -40,12 +40,12 @@ RUN export DEBIAN_FRONTEND=noninteractive \
       libprotobuf17 \
       libxxf86vm1 \
       xvfb \
-      x11-utils \
+      xauth \
   && apt-get -y --purge autoremove \
   && apt-get clean \
   && rm -rf /var/lib/apt/lists/*
 
-COPY --from=builder /usr/src/app /usr/src/app
+COPY --from=builder /usr/src/app /app
 
 ENV NODE_ENV="production"
 ENV CHOKIDAR_USEPOLLING=1
@@ -56,4 +56,6 @@ WORKDIR /data
 
 EXPOSE 80
 
-ENTRYPOINT ["/usr/src/app/run.sh"]
+ENTRYPOINT ["/app/docker-entrypoint.sh"]
+
+CMD ["-p", "80"]

docker-entrypoint.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+
+set -e
+
+if ! which -- "${1}"; then
+  # first arg is not an executable
+  xvfb-run --server-args="-screen 0 1024x768x24" -- node /app/ "$@"
+  exit $?
+fi
+
+exec "$@"