Added entrypoint to fix permission errors

bin/entrypoint.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+# detect userid:groupid of contents of data folder
+DATA_DIR="${DATA_DIR:-/data}"
+ARCHIVEBOX_USER="${ARCHIVEBOX_USER:-archivebox}"
+
+# Autodetect UID and GID of host user based on ownership of files in the volume
+USID=$(stat --format="%u" "$DATA_DIR")
+GRID=$(stat --format="%g" "$DATA_DIR")
+COMMAND="$@"
+
+# run django as the host user's uid:gid so that any files touched have the same permissions as outside the container
+# e.g. ./manage.py runserver
+
+chown "$USID":"$GRID" "$DATA_DIR"
+usermod -u $USID $ARCHIVEBOX_USER
+groupmod -g $GRID $ARCHIVEBOX_USER
+gosu $ARCHIVEBOX_USER bash -c "$COMMAND"