Added a custom docker entrypoint which chowns used volumes

This fixes issue #206.

.docker/partdb-entrypoint.sh

@@ -0,0 +1,43 @@
+#!/bin/sh
+#
+# This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
+#
+#  Copyright (C) 2019 - 2023 Jan Böhmer (https://github.com/jbtronics)
+#
+#  This program is free software: you can redistribute it and/or modify
+#  it under the terms of the GNU Affero General Public License as published
+#  by the Free Software Foundation, either version 3 of the License, or
+#  (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU Affero General Public License for more details.
+#
+#  You should have received a copy of the GNU Affero General Public License
+#  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+
+set -e
+
+# recursive chowns can take a while, so we'll just do it if the owner is wrong
+
+# Chown uploads/ folder if it does not belong to www-data
+if [ "$(stat -c '%u' /var/www/html/uploads)" != "$(id -u www-data)" ]; then
+    chown -R www-data:www-data /var/www/html/uploads
+fi
+
+# Do the same for the public/media folder
+if [ "$(stat -c '%u' /var/www/html/public/media)" != "$(id -u www-data)" ]; then
+    chown -R www-data:www-data /var/www/html/public/media
+fi
+
+# If var/db/ folder exists, do the same for it
+if [ -d /var/www/html/var/db ]; then
+    if [ "$(stat -c '%u' /var/www/html/var/db)" != "$(id -u www-data)" ]; then
+        chown -R www-data:www-data /var/www/html/var/db
+    fi
+fi
+
+# Pass to the original entrypoint
+exec "$@"