Switch to xvfb-run instead of manually calling Xvfb (#141)

This should ensure it always finds a display number. It also makes sure
to properly kill `Xvfb`, which we did not do before.

Dockerfile

@@ -49,7 +49,7 @@ RUN apt-get update && \
 
 # install unzip to unzip the server-reference.conf from the jar
 RUN apt-get update && \
-    apt-get -y install -y unzip && \
+    apt-get -y install -y unzip tini && \
     apt-get clean && \
     rm -rf /var/lib/apt/lists/*
 
@@ -100,6 +100,7 @@ RUN if command -v Xvfb; then \
 USER suwayomi
 EXPOSE 4567
 
+ENTRYPOINT ["tini", "--"]
 CMD ["/home/suwayomi/startup_script.sh"]
 
 # vim: set ft=dockerfile:

scripts/startup_script.sh

@@ -97,10 +97,7 @@ sed -i -r "s/server.opdsShowOnlyDownloadedChapters = ([0-9]+|[a-zA-Z]+)( #)?/ser
 sed -i -r "s/server.opdsChapterSortOrder = \"(.*?)\"( #)?/server.opdsChapterSortOrder = \"${OPDS_CHAPTER_SORT_ORDER:-\1}\" #/" /home/suwayomi/.local/share/Tachidesk/server.conf
 
 if command -v Xvfb >/dev/null; then
-  rm -f /tmp/.X0-lock
-  Xvfb :0 -screen 0 800x680x24 -nolisten tcp >/dev/null 2>&1 &
-  export DISPLAY=:0
-
+  command="xvfb-run --auto-servernum java"
   if [ -d /opt/kcef/jcef ]; then
     # if we have KCEF downloaded in the container, attempt to link it into the data directory where Suwayomi expects it
     if [ ! -d /home/suwayomi/.local/share/Tachidesk/bin ]; then
@@ -113,7 +110,7 @@ if command -v Xvfb >/dev/null; then
   if [ -d /home/suwayomi/.local/share/Tachidesk/bin/kcef ] || [ -L /home/suwayomi/.local/share/Tachidesk/bin/kcef ]; then
     # make sure all files are always executable. KCEF (and our downloader) ensure this on creation, but if the flag is lost
     # at some point, CEF will die
-    chmod -R a+x /home/suwayomi/.local/share/Tachidesk/bin/kcef || true
+    chmod -R a+x /home/suwayomi/.local/share/Tachidesk/bin/kcef 2>/dev/null || true
   fi
   export LD_PRELOAD=/home/suwayomi/.local/share/Tachidesk/bin/kcef/libcef.so
 else
@@ -121,6 +118,7 @@ else
 fi
 if [ -f /opt/catch_abort.so ]; then
   export LD_PRELOAD="/opt/catch_abort.so $LD_PRELOAD"
+  command="java"
 fi
 echo "LD_PRELOAD=$LD_PRELOAD"
-exec java -Duser.home=/home/suwayomi -jar "/home/suwayomi/startup/tachidesk_latest.jar";
+exec $command -Duser.home=/home/suwayomi -jar "/home/suwayomi/startup/tachidesk_latest.jar";