Merge pull request #706 from turbo124/debian

Fixes for php extension installer

debian/Dockerfile

@@ -20,7 +20,7 @@ RUN curl -s "https://api.github.com/repos/invoiceninja/invoiceninja/releases/lat
 FROM php:${PHP}-fpm
 
 # PHP modules
-ARG php_require="bcmath gd pdo_mysql zip"
+ARG php_require="bcmath gd pdo_mysql zip mbstring"
 ARG php_suggest="exif imagick intl pcntl soap saxon-12.5.0"
 ARG php_extra="opcache"
 
@@ -56,7 +56,9 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     && rm -rf /var/lib/apt/lists/*
 
 # Install PHP extensions
-RUN ( curl -sSLf https://github.com/mlocati/docker-php-extension-installer/releases/latest/download/install-php-extensions -o - || echo 'return 1' ) | sh -s \
+COPY --from=ghcr.io/mlocati/php-extension-installer /usr/bin/install-php-extensions /usr/local/bin/
+
+RUN install-php-extensions \
     ${php_require} \
     ${php_suggest} \
     ${php_extra}