Update Dockerfile

Update 'composer-setup.php' signature (see https://getcomposer.org/download/).

Dockerfile

@@ -16,11 +16,11 @@ ENV COMPOSER_ALLOW_SUPERUSER 1
 ENV COMPOSER_HOME /composer
 
 RUN php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');" \
- && php -r "if (hash_file('SHA384', 'composer-setup.php') === '93b54496392c062774670ac18b134c3b3a95e5a5e5c8f1a9f115f203b75bf9a129d5daa8ba6a13e2cc8a1da0806388a8') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;" \
- && php composer-setup.php --no-ansi --install-dir=/usr/bin --filename=composer \
- && php -r "unlink('composer-setup.php');" \
- && composer --ansi --version --no-interaction \
- && composer require jbelien/ovh-monitoring
+  && php -r "if (hash_file('sha384', 'composer-setup.php') === 'a5c698ffe4b8e849a443b120cd5ba38043260d5c4023dbf93e1558871f1f07f58274fc6f4c93bcfd858c6bd0775cd8d1') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;" \
+  && php composer-setup.php --no-ansi --install-dir=/usr/bin --filename=composer \
+  && php -r "unlink('composer-setup.php');" \
+  && composer --ansi --version --no-interaction \
+  && composer require jbelien/ovh-monitoring
 
 COPY . /var/www/html/