Document the error pages dir

README.md

@@ -139,6 +139,11 @@ server {
         proxy_pass http://127.0.0.1:8000;
     }
 
+    # Optional, when using the FLASK_ERROR_PAGES_DIR
+    # location /404images/ {
+    #     alias /srv/shared/errorpages/;
+    # }
+
     location /favicon.ico {
         alias /srv/whatever/_static/favicon.ico;
     }

staticshield.py

@@ -33,6 +33,7 @@ Session(app)
 # Verify the required configuration
 # SERVE_DIR: Base dir of the files we want to serve; Flask will take care not to escape this dir
 # MOTHERSHIP: Mothership server and login-url, which will redirect here with a sessionstart/SEKRIT
+# ERROR_PAGES_DIR: (optional) Base dir of 403.html, 404.html to show as alternative to default short error message
 config_vars = ['SERVE_DIR', 'MOTHERSHIP', 'ERROR_PAGES_DIR']
 for config_var in config_vars:
     if config_var not in app.config: