added gettext

Dockerfile

@@ -7,7 +7,7 @@ ARG TZ="UTC"
 
 RUN set -eux ; \
     apt-get update \
-    && apt-get -y install php-cli p7zip curl coreutils git make openssh-client patch subversion tini unzip zip php-zip php-bz2 composer tzdata \
+    && apt-get -y install php-cli p7zip curl coreutils git make openssh-client patch subversion tini unzip zip php-zip php-bz2 composer gettext tzdata \
     && apt-get -y clean
 
 RUN rm -f /etc/localtime \