update .env.sample and drop unused volume

.env.sample

@@ -49,9 +49,11 @@ SECRET_EMAIL_PASS_VERSION=v1
 # EMAIL_SUBJECT="Account Recovery"
 # EMAIL_TOKEN_EXPIRY_MINUTES=30
 
-COPY_ASSETS="flow_background.jpg|app:/web/dist/assets/images/"
-COPY_ASSETS="$COPY_ASSETS icon_left_brand.svg|app:/web/dist/assets/icons/"
-COPY_ASSETS="$COPY_ASSETS icon.png|app:/web/dist/assets/icons/"
+## custom css and assets
+#COMPOSE_FILE="$COMPOSE_FILE:compose.css-volume.yml"
+#COPY_ASSETS="flow_background.jpg|app:/web/dist/assets/images/"
+#COPY_ASSETS="$COPY_ASSETS icon_left_brand.svg|app:/web/dist/assets/icons/"
+#COPY_ASSETS="$COPY_ASSETS icon.png|app:/web/dist/assets/icons/"
 
 # Default CSS customisation
 # COMPOSE_FILE="$COMPOSE_FILE:compose.css.yml"

compose.css-volume.yml

@@ -10,9 +10,6 @@ services:
         target: /docker-entrypoint.sh
         mode: 0555
 
-volumes:
-  custom_css:
-
 configs:
   entrypoint_css:
     name: ${STACK_NAME}_entrypoint_css_${ENTRYPOINT_CSS_VERSION}