diff --git a/.env.sample b/.env.sample
index 43bd3d1..779ebcd 100644
--- a/.env.sample
+++ b/.env.sample
@@ -72,3 +72,37 @@ LOGGING_LEVEL_LOGGERS_APP=INFO
 ##############################################################################
 # Set to false to disable automatic migrations on backend startup
 # AUTO_MIGRATIONS=true
+
+##############################################################################
+# CONVERSION (file upload → Yjs via y-provider)
+##############################################################################
+# Allow uploading .docx/.md files for conversion to Yjs.
+# Recipe sets this to true (upstream default is false).
+# CONVERSION_UPLOAD_ENABLED=true
+# Upstream defaults (uncomment to override):
+# CONVERSION_FILE_MAX_SIZE=20971520
+# CONVERSION_FILE_EXTENSIONS_ALLOWED=.docx,.md
+# CONVERSION_API_ENDPOINT=convert
+# CONVERSION_API_CONTENT_FIELD=content
+# CONVERSION_API_TIMEOUT=30
+# CONVERSION_API_SECURE=false
+
+##############################################################################
+# DATABASE CONNECTION POOL
+##############################################################################
+# Upstream default (uncomment to override):
+# DB_PSYCOPG_POOL_ENABLED=false
+
+##############################################################################
+# EMAIL APP URL
+##############################################################################
+# DJANGO_EMAIL_URL_APP is set automatically in compose.yml to https://${DOMAIN}.
+# Override is not exposed via .env — edit compose.yml directly if needed.
+# (Upstream default falls back to Django's Site framework, not configured here.)
+
+##############################################################################
+# MEDIA AUTH HEADER
+##############################################################################
+# Header the backend reads for media auth subrequests.
+# Upstream default matches the recipe's nginx config (X-Original-URL).
+# MEDIA_AUTH_ORIGINAL_URL_HEADER=HTTP_X_ORIGINAL_URL
diff --git a/compose.yml b/compose.yml
index 0d43758..cd894ef 100644
--- a/compose.yml
+++ b/compose.yml
@@ -56,6 +56,20 @@ x-common-env: &common-env
   AI_MODEL: llama
   # Collaboration
   COLLABORATION_API_URL: https://$DOMAIN/collaboration/api/
+  # Email app URL (used in email templates; matches recipe DOMAIN)
+  DJANGO_EMAIL_URL_APP: "https://${DOMAIN}"
+  # Conversion (file upload → Yjs via y-provider)
+  CONVERSION_UPLOAD_ENABLED: "${CONVERSION_UPLOAD_ENABLED:-true}"
+  CONVERSION_FILE_MAX_SIZE:
+  CONVERSION_FILE_EXTENSIONS_ALLOWED:
+  CONVERSION_API_ENDPOINT:
+  CONVERSION_API_CONTENT_FIELD:
+  CONVERSION_API_TIMEOUT:
+  CONVERSION_API_SECURE:
+  # Database connection pool
+  DB_PSYCOPG_POOL_ENABLED:
+  # Media auth header (matches recipe nginx by default)
+  MEDIA_AUTH_ORIGINAL_URL_HEADER:
 
 x-postgres-env: &postgres-env
   # Postgresql db container configuration
@@ -91,7 +105,7 @@ services:
       labels:
         - "traefik.enable=false"
         - "coop-cloud.${STACK_NAME}.timeout=${TIMEOUT:-120}"
-        - "coop-cloud.${STACK_NAME}.version=0.3.0+v5.1.0"
+        - "coop-cloud.${STACK_NAME}.version=0.3.1+v5.1.0"
     user: "${DOCKER_USER:-1000}"
     healthcheck:
       test: ["CMD", "curl", "-f", "http://localhost:8080"]