Shamelessely copy mysql Dockerfile entrypoint style

Dockerfile

@@ -18,9 +18,6 @@ RUN pip install PyMySql
 # Install cron
 RUN apt-get install -y cron
 
-COPY entrypoint.sh /var/entrypoint.sh
-RUN chmod +x /var/entrypoint.sh
-
 COPY backup_script.sh /var/backup_script.sh
 RUN chmod +x /var/backup_script.sh
 
@@ -28,4 +25,8 @@ COPY borgbackup_cron /etc/cron.d/borgbackup_cron
 RUN chmod +x /etc/cron.d/borgbackup_cron
 RUN crontab /etc/cron.d/borgbackup_cron
 
-CMD [ "/var/entrypoint.sh" ]
+COPY entrypoint.sh /var/entrypoint.sh
+RUN chmod +x /var/entrypoint.sh
+ENTRYPOINT [ "/var/entrypoint.sh" ]
+
+CMD ["cron" "-f"]

entrypoint.sh

@@ -1,4 +1,5 @@
 #!/bin/bash
+bash set -eo pipefail
 
 # Add known hosts
 if [[ -n "$SSH_KNOWN_HOSTS" ]]; then
@@ -35,5 +36,4 @@ fi
 # Make env variables accessible in crontab
 declare -p | grep -Ev 'BASHOPTS|BASH_VERSINFO|EUID|PPID|SHELLOPTS|UID' > /container.env
 
-echo "Run the crontab in the foreground"
-cron -f
+exec "$@"