Docker exposing ports site can't be reached - docker

Question

I have exposed the required ports in my dockerfiles as well mapped them in my docker-compose.yml.
If i create containers without a docker-compose.yml i can access everything, but if i use docker-compose.yml file i cannot access 2 out of 3 images via a http-get request.
But according to docker port <container-name> the ports are mapped:
bitmovin#bitmovin-VirtualBox:~/Documents$ docker port php-container 8080:
0.0.0.0:8080
bitmovin#bitmovin-VirtualBox:~/Documents$ docker port php-container:
8080/tcp -> 0.0.0.0:8080
bitmovin#bitmovin-VirtualBox:~/Documents$ docker port comp-container:
8080/tcp -> 0.0.0.0:8070
bitmovin#bitmovin-VirtualBox:~/Documents$ docker port phpmyadmin-container:
8080/tcp -> 0.0.0.0:8090
I don't know why i cannot access the phpmyadmin-container and the php-container but the comp-container if i use a docker-compose file.
Did i miss something important?
php-image:
FROM php:7.0-apache
EXPOSE 8080
COPY Frontend/ /var/www/html/aw3somevideo/
COPY Frontend/ /var/www/html/
RUN chown -R www-data:www-data /var/www/html
RUN chmod -R 755 /var/www/html
RUN docker-php-ext-install mysqli
RUN php -i | grep -F .default_socket
comp-image:
FROM java:openjdk-8u91-jdk
EXPOSE 8070
CMD java -jar encoding-comparison-1.0.jar
ADD encoding-comparison-1.0.jar /encoding-comparison-1.0.jar
phpmyadmin-image:
FROM phpmyadmin/phpmyadmin
EXPOSE 8090
docker-compose.yml:
db:
image: mysql-image
ports:
- "3306:3306"
volumes:
- /var/lib/mysql
environment:
- MYSQL_ROOT_PASSWORD=Bitmovin
- DB_NAME=aw3somevideo
- DB_USER=Bitmovin
- DB_PASS=Bitmovin
container_name: mysql-container
admin:
image: phpmyadmin-image
ports:
- "8090:8080"
links:
- db
container_name: phpmyadmin-container
backend:
image: comp-image
ports:
- "8070:8080"
volumes:
- ./src:/var/www/backend
links:
- db
container_name: comp-container
php:
image: php-image
volumes:
- ./src:/var/www/html
links:
- db
ports:
- "8080:8080"
container_name: php-container

Answer 1

The solution was to change the ports from admin and php from "8080:8080" and "8090:8080" to "8080:80" and "8090:80" respectively.