Fix incorrect path when setting file permissions for data directory

(cherry picked from commit 3eb4469)

entrypoint.sh

@@ -31,7 +31,7 @@ flatnotes_command="python -m \
 
 if [ `id -u` -eq 0 ] && [ `id -g` -eq 0 ]; then
     echo Setting file permissions...
-    chown -R ${PUID}:${PGID} ./
+    chown -R ${PUID}:${PGID} ${FLATNOTES_PATH}
 
     echo Starting flatnotes as user ${PUID}...
     exec ${EXEC_TOOL} ${PUID}:${PGID} ${flatnotes_command}