add the en_US.UTF-8 locale

docker/Dockerfile_ubuntu_pdal

@@ -58,6 +58,7 @@ RUN apt-get update && apt-get upgrade -y && \
     libsqlite3-dev \
     libtiff-dev \
     libzstd-dev \
+    locales \
     make \
     mesa-common-dev \
     moreutils \
@@ -83,6 +84,7 @@ RUN apt-get update && apt-get upgrade -y && \
     zlib1g-dev
 
 RUN echo LANG="en_US.UTF-8" > /etc/default/locale
+RUN echo en_US.UTF-8 UTF-8 >> /etc/locale.gen && locale-gen
 
 ## install the latest projection library for GRASS GIS
 WORKDIR /src