build(docker): optimize docker build

Author: felixfbecker

Dockerfile

@@ -7,11 +7,6 @@
 FROM php:7-cli
 MAINTAINER Felix Becker <felix.b@outlook.com>
 
-RUN apt-get update \
-    # Needed for CodeSniffer
-    && apt-get install -y libxml2 libxml2-dev \
-    && rm -rf /var/lib/apt/lists/*
-
 RUN docker-php-ext-configure pcntl --enable-pcntl
 RUN docker-php-ext-install pcntl
 COPY ./php.ini /usr/local/etc/php/conf.d/

release-docker.php

@@ -6,5 +6,7 @@
 $version = json_decode(file_get_contents(__DIR__ . '/package.json'))->version;
 
 system("docker login -e=$dockerEmail -u=$dockerUsername -p=$dockerPassword");
-system("docker build -t felixfbecker/php-language-server:$version .");
+system("docker build -t felixfbecker/php-language-server:latest .");
+system("docker tag felixfbecker/php-language-server:latest felixfbecker/php-language-server:$version .");
 system("docker push felixfbecker/php-language-server:$version");
+system("docker push felixfbecker/php-language-server:latest");