cron job in docker container

docker-compose.yml

version: '3.1'

services:
  snscrape:
    image: alpine:latest
    volumes:
      - ./:/usr/src/app
    working_dir: /usr/src/app
    entrypoint:
      - ./entrypoint.sh

entrypoint.sh

#!/bin/sh

chmod +x task.sh

echo "* * * * * /bin/sh /usr/src/app/task.sh >> /usr/src/app/task.log 2>&1
# This extra line makes it a valid cron" > task-scheduler.txt

crontab task-scheduler.txt

touch task.log

crond && tail -f task.log

task.sh

#!/bin/bash

timestamp=`date +%Y/%m/%d-%H:%M:%S`

echo "[task] system path is $PATH at $timestamp"

How to run a cron job inside a docker container?