Change php-gmp to php7.1-gmp

7_1/Dockerfile

@@ -15,7 +15,7 @@ RUN apt-get update; \
                         tmux graphviz build-essential unzip mysql-client \
                         php7.1 php7.1-mysql php7.1-curl php7.1-xml php7.1-zip \
                         php7.1-bcmath php7.1-mbstring php7.1-dom php7.1-amqp \
-                        php7.1-soap php7.1-snmp php7.1-intl php-gmp \
+                        php7.1-soap php7.1-snmp php7.1-intl php7.1-gmp \
                         libcurl3-dev php7.1-fpm php7.1-soap; \  
     chmod 0600 /opt/keys/*; \
     chmod +x /opt/composer.sh; \