Hack composer into the entrypoint

entrypoint.sh.tmpl

@@ -6,7 +6,18 @@ init_db() {
 	set -eu
 
 	if ! type mysql > /dev/null 2>&1; then
-		apt update && apt install -y mariadb-client
+		apt update && apt install -y \
+			curl \
+			git \
+			mariadb-client \
+			php-cli \
+			unzip
+
+		curl -sS https://getcomposer.org/installer -o composer-setup.php
+		export HASH="a69df12e86a0a18fbedfc91a33d5f9acc5cf939576e0258326074fc1b2ee1aea"
+		php -r "if (hash_file('SHA384', 'composer-setup.php') === '$HASH') { echo 'Composer installer verified'; } else { echo 'Composer installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
+		php composer-setup.php --install-dir=/usr/local/bin --filename=composer --version=1.10.15
+		composer -V
 	fi
 
 	PASSWORD=$(cat /run/secrets/db_password)