Обновил зависимости

docker/Dockerfile

@@ -1,6 +1,4 @@
-ARG PHP_BASE_IMAGE
-
-FROM ${PHP_BASE_IMAGE}
+FROM php:7.3-cli
 
 RUN apt-get update && apt-get install -y \
     libtidy-dev \
@@ -22,11 +20,11 @@ RUN apt-get update \
     && rm -rf /var/lib/apt/lists/*
 
 # get composer and required tools
-RUN curl -sLO https://getcomposer.org/download/1.9.0/composer.phar \
+RUN curl -sLO https://getcomposer.org/download/1.9.3/composer.phar \
     && mv composer.phar /usr/local/bin/composer \
     && chmod +x /usr/local/bin/composer
 
 # Deployer
-RUN curl -sLO https://deployer.org/releases/v6.4.6/deployer.phar \
+RUN curl -sLO https://deployer.org/releases/v6.7.3/deployer.phar \
     && mv deployer.phar /usr/local/bin/dep \
     && chmod +x /usr/local/bin/dep