Improve example since packages installed in build image not available in build phase

[garry-t]

On Page: Create a build base image

I follow this docs, packages installed in build image in some reason not available during build phase.

# build image docker
FROM ubuntu:jammy

COPY ./bin/yj-linux /usr/local/bin/yj

# Workaround for docker <= 20.10.9
RUN sed -i -e 's/^APT/# APT/' -e 's/^DPkg/# DPkg/' /etc/apt/apt.conf.d/docker-clean

# Install packages that we want to make available at both build and run time
RUN apt-get update && apt-get install -y xz-utils ca-certificates libyaml-0-2 git cmake libutfcpp-dev\
    libjemalloc2 \
    apt-transport-https \
    build-essential \
    ca-certificates \
    curl \
    file \
    ffmpeg\
    git-core \
    gnupg \
    imagemagick \
    libcurl4-openssl-dev \
    libffi-dev \
    libfontconfig \
    libmagickcore-dev \
    libpq-dev \
    libreadline-dev \
    libssl-dev \
    libxext6 \
    libxml2-dev \
    libxrender-dev \
    libxslt1-dev \
    libyaml-dev \
    mediainfo \
    python3-pip \
    python3-setuptools \
    zlib1g-dev &&\
    apt-get clean && \
    rm -rf /var/lib/apt/lists/* && \
    python3 -m pip install mutagen



RUN git clone https://github.com/taglib/taglib.git /tmp/taglib && \
    cd /tmp/taglib && \
    git checkout 50b89ad19a3097a626b834c0265b2f4b62d2f274 && \
    mkdir build && cd build && \
    cmake -DCMAKE_INSTALL_PREFIX=/usr/local -DBUILD_SHARED_LIBS=ON -DCMAKE_BUILD_TYPE=Release .. && \
    make -j$(nproc) && make install && \
    rm -rf /tmp/taglib

# Set required CNB user information
ARG cnb_uid=1000
ARG cnb_gid=1000
ENV CNB_USER_ID=${cnb_uid}
ENV CNB_GROUP_ID=${cnb_gid}

# Create user and group
RUN groupadd cnb --gid ${CNB_GROUP_ID} && \
  useradd --uid ${CNB_USER_ID} --gid ${CNB_GROUP_ID} -m -s /bin/bash cnb

# Set user and group
USER ${CNB_USER_ID}:${CNB_GROUP_ID}

# Set required CNB target information
LABEL io.buildpacks.base.distro.name="ubuntu"
LABEL io.buildpacks.base.distro.version="22.04"

[[io.buildpacks.group]]
id = "heroku/ruby"

This build fails to find openssl-dev, libpq-dev and probably other packages.

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
[builder]       
[builder]       current directory:
[builder]       /layers/heroku_ruby/gems/ruby/3.2.0/gems/openssl-3.0.0/ext/openssl
[builder]       /layers/heroku_ruby/ruby/bin/ruby extconf.rb
[builder]       checking for rb_io_maybe_wait()... yes
[builder]       checking for t_open() in -lnsl... no
[builder]       checking for socket() in -lsocket... no
[builder]       checking for openssl/ssl.h... no
[builder]       *** extconf.rb failed ***
[builder]       Could not create Makefile due to some reason, probably lack of necessary
[builder]       libraries and/or headers.  Check the mkmf.log file for more details.  You may
[builder]       need configuration options.

[builder]           openssl
[builder]       
[builder]       
[builder]       Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
[builder]       
[builder]           current directory: /layers/heroku_ruby/gems/ruby/3.2.0/gems/pg-1.5.8/ext
[builder]       /layers/heroku_ruby/ruby/bin/ruby extconf.rb
[builder]       Calling libpq with GVL unlocked
[builder]       checking for pg_config... no
[builder]       checking for libpq per pkg-config... no
[builder]       Using libpq from 
[builder]       checking for libpq-fe.h... no
[builder]       Can't find the 'libpq-fe.h header
[builder]       *****************************************************************************
[builder]       
[builder]       Unable to find PostgreSQL client library.
[builder]       
[builder]       Please install libpq or postgresql client package like so:
[builder]         sudo apt install libpq-dev
[builder]         sudo yum install postgresql-devel
[builder]         sudo zypper in postgresql-devel
[builder]         sudo pacman -S postgresql-libs

[AidanDelaney]

Thanks for this. I'll double-check it.