问Dockerfile - 错误：for php无法启动服务php：OCI运行时创建失败

EN

root-dir
- src // this is where my php / laravel code lives
-- info.php // file having phpinfo(); just to ensure that everything has set properly
- docker // this is where all containers and config settings live
-- php etc..
- docker-compose.yml

services:
    nginx:
        image: nginx:alpine
        container_name: webserver
        ports:
            - 8888:80
        volumes:
            - ./src:/var/www/html
            - ./docker/nginx/default.conf:/etc/nginx/conf.d/default 
        depends_on:
            - php
        networks:
            - appnet
    php:
        build:
            context: ./docker/php
            dockerfile: Dockerfile
        image: lykos/php:latest
        container_name: php
        depends_on:
            - mysql
        volumes:
            - ./src:/var/www/html
        networks:
            - appnet
    mysql:
        image: mysql:5.7
        container_name: mysql
        environment:
            MYSQL_ROOT_PASSWORD: secret
            MYSQL_DATABASE: homestead
            MYSQL_USER: homestead
            MYSQL_PASSWORD: secret
        volumes:
            - data:/var/lib/mysql
        networks:
            - appnet

networks:
    appnet:
        driver: bridge
volumes:
    data:
        driver: local

FROM ubuntu:18.04

ENV DEBIAN_FRONTEND=noninteractive

RUN apt-get update
RUN apt-get install -y curl zip unzip --no-install-recommends apt-utils software-properties-common
RUN add-apt-repository -y ppa:ondrej/php

RUN apt-get update
RUN apt-get install -y php7.2-fpm php7.2-cli php7.2-mysql php7.2-xml php7.2-mcrypt  \
                       php7.2-bcmath php7.2-bz2 php7.2-curl php7.2-gd php7.2-gettext  \
                       php7.2-zip php7.2-soap php7.2-odbc php7.2-json php7.2-geoip  \
                       php7.2-igbinary php7.2-imagick php7.2-mbstring php7.2-msgpack  \
                       php7.2-ssh2 php7.2-memcached php7.2-xdebug

RUN php -r "readfile('http://getcomposer.org/installer');" | php -- --install-dir=/usr/bin/ --filename=composer
RUN mkdir /run/php
RUN apt-get remove -y --purge software-properties-common

COPY config/php.ini /etc/php/7.2/cli/php.ini
COPY config/php.ini /etc/php/7.2/fpm/php.ini


EXPOSE 9000

ENTRYPOINT ["/usr/bin/php"]
CMD ["--version"]

ERROR: for php Cannot start service php: OCI runtime create failed: container_linux.go:348: starting container process caused "exec: \"php-fpm\": executable file not found in $PATH": unknown

172.28.0.1 - - [17/Jul/2018:19:57:06 +0000] "GET / HTTP/1.1" 304 0 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36" "-"
172.28.0.1 - - [17/Jul/2018:19:57:12 +0000] "GET /info.php HTTP/1.1" 404 571 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36" "-"
2018/07/17 19:57:12 [error] 9#9: *1 open() "/usr/share/nginx/html/info.php" failed (2: No such file or directory), client: 172.28.0.1, server: localhost, request: "GET /info.php HTTP/1.1", host: "localhost:8888"

PHP 7.1.19-1+ubuntu18.04.1+deb.sury.org+1 (fpm-fcgi) (built: Jul  9 2018 13:14:18)
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.1.0, Copyright (c) 1998-2018 Zend Technologies
    with Zend OPcache v7.1.19-1+ubuntu18.04.1+deb.sury.org+1, Copyright (c) 1999-2018, by Zend Technologies
    with Xdebug v2.6.0, Copyright (c) 2002-2018, by Derick Rethans

server {

  listen 80 default_server;
  root /var/www/html;
  index index.html index.php;

  charset utf-8;

  location / {
    try_files $uri $uri/ /index.php?$query_string;
  }

  location = /favicon.ico { access_log off; log_not_found off; }
  location = /robots.txt { access_log off; log_not_found off; }

  access_log off;
  error_log /var/log/nginx/error.log error;

  sendfile off;

  client_max_body_size 100m;

  location ~ \.php$ {
    fastcgi_split_path_info ^(.+\.php)(/.+)$;
    fastcgi_pass php:9000;
    fastcgi_index index.php;
    include fastcgi_params;
    fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
    fastcgi_intercept_errors off;
    fastcgi_buffer_size 16k;
    fastcgi_buffers 4 16k;
  }

  location ~ /\.ht {
    deny all;
  }
}