Refactor/Change Dockerfiles cmd from shell to exec form (#6019)

* Update `dockerapi/Dockerfile` CMD from shell to exec format

* Update `postfix/Dockerfile` CMD from shell to exec format

* Update `sogo/Dockerfile` CMD from shell to exec format

* Update `unbound/Dockerfile` CMD from shell to exec format

* Update `watchdog/Dockerfile` CMD from shell to exec format

data/Dockerfiles/dockerapi/Dockerfile

@@ -24,4 +24,4 @@ COPY main.py /app/main.py
 COPY modules/ /app/modules/
 
 ENTRYPOINT ["/bin/sh", "/app/docker-entrypoint.sh"]
-CMD exec python main.py
+CMD ["python", "main.py"]

data/Dockerfiles/postfix/Dockerfile

@@ -60,4 +60,4 @@ EXPOSE 588
 
 ENTRYPOINT ["/docker-entrypoint.sh"]
 
-CMD exec /usr/bin/supervisord -c /etc/supervisor/supervisord.conf
+CMD ["/usr/bin/supervisord", "-c", "/etc/supervisor/supervisord.conf"]

data/Dockerfiles/sogo/Dockerfile

@@ -55,4 +55,4 @@ RUN chmod +x /bootstrap-sogo.sh \
 
 ENTRYPOINT ["/docker-entrypoint.sh"]
 
-CMD exec /usr/bin/supervisord -c /etc/supervisor/supervisord.conf
+CMD ["/usr/bin/supervisord", "-c", "/etc/supervisor/supervisord.conf"]

data/Dockerfiles/unbound/Dockerfile

@@ -33,4 +33,4 @@ HEALTHCHECK --interval=30s --timeout=10s \
   CMD sh -c '[ -f /tmp/healthcheck_status ] && [ "$(cat /tmp/healthcheck_status)" -eq 0 ] || exit 1'
 
 ENTRYPOINT ["/docker-entrypoint.sh"]
-CMD exec /usr/bin/supervisord -c /etc/supervisor/supervisord.conf
+CMD ["/usr/bin/supervisord", "-c", "/etc/supervisor/supervisord.conf"]

data/Dockerfiles/watchdog/Dockerfile

@@ -37,4 +37,4 @@ RUN apk add --update \
 COPY watchdog.sh /watchdog.sh
 COPY check_mysql_slavestatus.sh /usr/lib/nagios/plugins/check_mysql_slavestatus.sh
 
-CMD /watchdog.sh
+CMD ["/watchdog.sh"]