revert: remove custom CSS theming from asciinema

asciinema/compose.yaml

@@ -3,15 +3,12 @@ services:
     image: ${ASCIINEMA_IMAGE:-ghcr.io/asciinema/asciinema-server:latest}
     container_name: ${ASCIINEMA_COMPOSE_PROJECT_NAME}_app
     restart: unless-stopped
-    entrypoint: ["/entrypoint-wrapper.sh"]
     networks:
       - compose_network
     extra_hosts:
       - "smtp.ionos.de:213.165.67.97"
     volumes:
       - asciinema_data:/var/opt/asciinema
-      - ./theme/custom.css:/opt/app/lib/asciinema-1.0.0/priv/static/assets/custom.css:ro
-      - ./entrypoint-wrapper.sh:/entrypoint-wrapper.sh:ro
     environment:
       SECRET_KEY_BASE: ${ASCIINEMA_SECRET_KEY}
       URL_HOST: ${ASCIINEMA_TRAEFIK_HOST}
@@ -24,6 +21,7 @@ services:
       SMTP_SSL: true
       MAIL_FROM_ADDRESS: ${EMAIL_FROM}
       SIGN_UP_DISABLED: ${ASCIINEMA_SIGN_UP_DISABLED:-false}
+      DEFAULT_AVATAR: gravatar
     labels:
       - 'traefik.enable=${ASCIINEMA_TRAEFIK_ENABLED}'
       # Main web interface - HTTP to HTTPS redirect