Add changes to Dcokerfile

.travis.yml

@@ -13,7 +13,7 @@ install:
   - sudo pip install docker-compose
   - docker-compose version
   - cat Dockerfile
-  - docker-compose build --build-arg PHP_VERSION="${TRAVIS_PHP_VERSION}"
+  - docker-compose build --build-arg PHP_VERSION=${TRAVIS_PHP_VERSION}
 
 script:
   - docker-compose up --exit-code-from php

Dockerfile

@@ -5,8 +5,9 @@ FROM php:${PHP_VERSION}-cli
 RUN pecl install xdebug
 
 RUN apt-get update && \
-    apt-get install -y autoconf pkg-config libssl-dev git && \
-    pecl install mongodb git zlib1g-dev && docker-php-ext-enable mongodb && \
+    apt-get install -y autoconf pkg-config libssl-dev git zlib1g-dev
+
+RUN pecl install mongodb && docker-php-ext-enable mongodb && \
     docker-php-ext-install -j$(nproc) pdo pdo_mysql zip && docker-php-ext-enable xdebug
 
 RUN curl -sS https://getcomposer.org/installer | php \