Update Dockerfile

7_1/Dockerfile

@@ -16,7 +16,7 @@ RUN apt-get update; \
                         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 php7.1-gmp \
-                        libcurl3-dev php7.1-fpm php7.1-soap; \  
+                        libcurl3-dev php7.1-fpm php7.1-soap php7.1-ssh2; \  
     chmod 0600 /opt/keys/*; \
     chmod +x /opt/composer.sh; \
     sh /opt/composer.sh; \