chore: docker improve cache

Author: divine

Dockerfile

@@ -1,8 +1,5 @@
-ARG PHP_VERSION=8.1
-ARG COMPOSER_VERSION=2.5.4
-
-FROM composer:${COMPOSER_VERSION}
-FROM php:${PHP_VERSION}-cli
+FROM composer:2.5.4
+FROM php:8.1-cli
 
 RUN apt-get update && \
     apt-get install -y autoconf pkg-config libssl-dev git libzip-dev zlib1g-dev && \
@@ -14,8 +11,10 @@ COPY --from=composer /usr/bin/composer /usr/local/bin/composer
 
 WORKDIR /code
 
-COPY . .
+COPY composer.* ./
 
 RUN composer install
 
+COPY ./ ./
+
 CMD ["./vendor/bin/phpunit"]