Entrypoint at portainer.io is not working like in Docker image - docker

Question

I have a docker Image with the following Entrypoint.
ENTRYPOINT [ "sh", "-c", "/var/www/html/app/Console/cake schema update -y && /var/www/html/app/Console/cake migration && apache2-foreground"]
Now I want to use portainer.io to manage docker swarm. I created a new service to where I want to set the entrypoint (instead of in the Image). So I deleted the entrypoint In the dockerfile, and added it into "Image" > "Entrypoint". I added:
sh -c /var/www/html/app/Console/cake schema update -y && /var/www/html/app/Console/cake migration && apache2-foreground
However, the containers of the service are failing to start. Without the entrypoint, the containers are starting. Here is an example of the Dockerfile, where the Entrypoint is set.
#start with base Image from php
FROM php:7.3-apache
#install system dependencies and enable PHP modules
RUN apt-get update && apt-get install -y \
libicu-dev \
libpq-dev \
libmcrypt-dev \
mysql-client \
git \
zip \
unzip \
libzip-dev \
&& docker-php-ext-configure zip --with-libzip \
&& docker-php-ext-install zip \
&& rm -r /var/lib/apt/lists/* \
&& docker-php-ext-configure pdo_mysql --with-pdo-mysql=mysqlnd \
&& docker-php-ext-install \
intl \
mbstring \
pcntl \
pdo_mysql \
pdo_pgsql \
pgsql \
opcache \
gettext
# zip \
# mcrypt \
#configure imap for mails
RUN apt-get update && \
apt-get install -y \
libc-client-dev libkrb5-dev && \
rm -r /var/lib/apt/lists/*
RUN docker-php-ext-configure imap --with-kerberos --with-imap-ssl && \
docker-php-ext-install -j$(nproc) imap
#install mcrypt
RUN apt-get update \
&& apt-get install -y libmcrypt-dev \
&& rm -rf /var/lib/apt/lists/* \
&& pecl install mcrypt-1.0.2 \
&& docker-php-ext-enable mcrypt
#install composer
RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/bin/ --filename=composer
#change uid and gid of apache to docker user uid/gid
RUN usermod -u 1000 www-data && groupmod -g 1000 www-data
# enable apache module rewrite
RUN a2enmod rewrite
#change ownership of our applications
RUN chown -R www-data:www-data /var/www/html
#Copy file to start schema update on startup
ENTRYPOINT [ "sh", "-c", "/var/www/html/app/Console/cake schema update -y && /var/www/html/app/Console/cake migration && apache2-foreground"]
EXPOSE 80
How do I have to set the Entrypoint? When I set it a portainer, it is later shown under the section CDM.