Add Xdebug

Disabled by default, this will make Xdebug available for reporting code coverage via PHPUnit.

Fixes #5 (closed)

php/5.6/Dockerfile

@@ -4,14 +4,42 @@ LABEL maintainer="ethitter"
 LABEL version="1.0"
 
 RUN apt-get update \
-    && apt-get -yqqf install lsb-release zip unzip rsync subversion git mysql-client libicu-dev libpng-dev libbz2-dev default-libmysqlclient-dev --fix-missing --no-install-recommends \
+    && apt-get -yqqf install \
+      lsb-release \
+      zip \
+      unzip \
+      rsync \
+      subversion \
+      git \
+      libicu-dev \
+      libpng-dev \
+      libbz2-dev \
+      default-libmysqlclient-dev \
+      libzip-dev \
+      libonig-dev \
+      --fix-missing \
+      --no-install-recommends \
     && apt-get clean \
     && rm -rf /var/lib/apt/lists/*
 
-RUN docker-php-ext-install mbstring mysqli intl gd zip bz2
+RUN docker-php-ext-install \
+      mbstring \
+      mysqli \
+      intl \
+      gd \
+      zip \
+      bz2 \
+    && php -m
+
+ENV NVM_DIR /usr/local/nvm
 
 SHELL ["/bin/bash", "-o", "pipefail", "-c"]
-RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer
-RUN chmod +x /usr/local/bin/composer
+RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer \
+    && chmod +x /usr/local/bin/composer \
+    && composer --version \
+    && mkdir $NVM_DIR \
+    && curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/master/install.sh | bash \
+    && . $NVM_DIR/nvm.sh \
+    && nvm --version
 
 ENV PATH=/root/.composer/vendor/bin:$HOME/.composer/vendor/bin:$PATH