Обновил сборку и зависимости

docker/php/Dockerfile

@@ -0,0 +1,7 @@
+FROM php:7.4.21-cli
+
+COPY ./docker/provision.sh /opt/
+
+RUN /opt/provision.sh
+
+WORKDIR /srv/app

docker/php/provision.sh

@@ -0,0 +1,29 @@
+#!/usr/bin/env sh
+
+set -eux
+
+apt-get update && apt-get install -y \
+    curl \
+    git \
+    gnupg \
+    gzip \
+    libtidy-dev \
+    rsync \
+    zip \
+;
+
+docker-php-ext-install tidy \
+    && docker-php-ext-enable tidy
+
+# Project folder
+mkdir -p /srv/app
+
+# Composer and required tools
+curl -sLO https://getcomposer.org/download/2.0.6/composer.phar \
+    && mv composer.phar /usr/local/bin/composer \
+    && chmod +x /usr/local/bin/composer
+
+# Deployer
+curl -sLO https://deployer.org/releases/v6.8.0/deployer.phar \
+    && mv deployer.phar /usr/local/bin/dep \
+    && chmod +x /usr/local/bin/dep