chore(prod): support .env.docker in crons, fix WAL mapping and add canvas copy in Dockerfile

docker-compose.yml

@@ -12,6 +12,7 @@ services:
       POSTGRES_DB: ${POSTGRES_DB:-memento}
     volumes:
       - postgres-data:/var/lib/postgresql/data
+      - ./backups:/var/lib/postgresql/backups
     ports:
       - "127.0.0.1:${POSTGRES_PORT:-5433}:5432"
     healthcheck: