🔧(config) add CalDAV environment variables

Add configuration for CalDAV server URL, credentials and
IMIP callback settings for calendar invitations.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

compose.yaml

@@ -108,8 +108,6 @@ services:
       - ./src/frontend/:/home/frontend/
       - /home/frontend/node_modules
       - /home/frontend/apps/calendars/node_modules
-      - /home/frontend/packages/open-calendar/dist
-      - /home/frontend/packages/open-calendar/node_modules
     ports:
       - "8920:3000"
 

env.d/development/backend.defaults

@@ -50,6 +50,8 @@ OIDC_RS_ALLOWED_AUDIENCES=""
 CALDAV_URL=http://caldav:80
 CALDAV_OUTBOUND_API_KEY=changeme-outbound-in-production
 CALDAV_INBOUND_API_KEY=changeme-inbound-in-production
+# Internal URL for CalDAV scheduling callbacks (accessible from CalDAV container)
+CALDAV_CALLBACK_BASE_URL=http://backend-dev:8000
 
 # Frontend
 FRONTEND_THEME=default

env.d/development/caldav.defaults

@@ -6,3 +6,6 @@ PGPASSWORD=pass
 CALENDARS_BASE_URI=/api/v1.0/caldav/
 CALDAV_INBOUND_API_KEY=changeme-inbound-in-production
 CALDAV_OUTBOUND_API_KEY=changeme-outbound-in-production
+# Default callback URL for sending scheduling notifications (emails)
+# Used when clients (like Apple Calendar) don't provide X-CalDAV-Callback-URL header
+CALDAV_CALLBACK_URL=http://backend-dev:8000/api/v1.0/caldav-scheduling-callback