diff --git a/archivebox/main.py b/archivebox/main.py
index bad93706..169921fd 100644
--- a/archivebox/main.py
+++ b/archivebox/main.py
@@ -76,6 +76,7 @@ from .config import (
     ARCHIVE_DIR,
     LOGS_DIR,
     CONFIG_FILE,
+    CONFIG_FILENAME,
     ARCHIVE_DIR_NAME,
     SOURCES_DIR_NAME,
     LOGS_DIR_NAME,
@@ -131,10 +132,13 @@ ALLOWED_IN_OUTPUT_DIR = {
     LOGS_DIR_NAME,
     SQL_INDEX_FILENAME,
     f'{SQL_INDEX_FILENAME}-wal',
+    f'{SQL_INDEX_FILENAME}-shm',
     JSON_INDEX_FILENAME,
     HTML_INDEX_FILENAME,
     ROBOTS_TXT_FILENAME,
     FAVICON_FILENAME,
+    CONFIG_FILENAME,
+    f'{CONFIG_FILENAME}.bak',
 }
 
 @enforce_types
diff --git a/docker-compose.yml b/docker-compose.yml
index a8fd08a9..b6338e0a 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -21,11 +21,12 @@ services:
         environment:
             - USE_COLOR=True
             - SHOW_PROGRESS=False
-            # - SEARCH_BACKEND_ENGINE=sonic
+            # - SEARCH_BACKEND_ENGINE=sonic     # uncomment these if you enable sonic below
             # - SEARCH_BACKEND_HOST_NAME=sonic
             # - SEARCH_BACKEND_PASSWORD=SecretPassword
         volumes:
             - ./data:/data
+            # - ./archivebox:/app/archivebox    # for developers working on archivebox
     
     # To run the Sonic full-text search backend, create an ./etc/sonic folder
     # and download the sonic config file from here into that folder: