Add php yaml extension. remove eslint in order to avoid errors.

Dockerfile.ci

@@ -36,6 +36,8 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
       jpegoptim \
       optipng \
       pngquant \
+      # for yaml
+      libyaml-dev \
     && apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 
 RUN docker-php-ext-configure gd --with-freetype-dir=/usr/include/ --with-jpeg-dir=/usr/include/ \
@@ -63,8 +65,8 @@ RUN docker-php-ext-configure gd --with-freetype-dir=/usr/include/ --with-jpeg-di
       sysvsem \
       sysvshm \
       zip \
-    && pecl install redis-2.2.8 apcu-4.0.11 raphf-1.1.2 propro-1.0.2 \
-    && docker-php-ext-enable redis apcu raphf propro \
+    && pecl install redis-2.2.8 apcu-4.0.11 raphf-1.1.2 propro-1.0.2 yaml-1.3.1 \
+    && docker-php-ext-enable redis apcu raphf propro yaml \
     && pecl install pecl_http-2.5.6 \
     && docker-php-ext-enable http \
     && printf "upload_max_filesize = 128M\npost_max_size = 128M" > $PHP_INI_DIR/conf.d/00-max_filesize.ini
@@ -101,6 +103,6 @@ RUN apt-get update \
   && echo 'deb-src https://deb.nodesource.com/node_6.x jessie main' >> /etc/apt/sources.list.d/nodesource.list \
   && apt-get update \
   && apt-get install nodejs \
-  && npm install -g yarn [email protected] \
+  && npm install -g yarn \
   && npm cache clean --force \
   && apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*