How to compose PHP7 Dockerfile with intl and ICU version 55.1?

Question

PHP

Have a Dockerfile

FROM php:7.0-fpm
RUN apt-get update \
    && apt-get install -y libicu55 \
    && docker-php-ext-install -j$(nproc) intl

But the debian:jessie from which the php7 image is built does not contain libicu55.
In other words, how to install jessie INTL on debian with ICU version 55.1?

Answer 1

It is necessary to find a repository for the distribution kit used with the required software version, and register it in /etc/apt/sources.list
And then install the required package with the version in the future.