feat: moved buster-slim-pg11 here

.gitlab-ci.yml

+
+build_buster-slim-pg11:
+  image:
+    name: gcr.io/kaniko-project/executor:debug
+    entrypoint: [""]
+  script:
+    - echo "{\"auths\":{\"$CI_REGISTRY\":{\"username\":\"$CI_REGISTRY_USER\",\"password\":\"$CI_REGISTRY_PASSWORD\"}}}" > /kaniko/.docker/config.json
+    - /kaniko/executor
+      --context $CI_PROJECT_DIR/library/buster-slim-pg11
+      --dockerfile $CI_PROJECT_DIR/library/buster-slim-pg11/Dockerfile
+      --destination $CI_REGISTRY_IMAGE/buster-slim-pg11
 
 build_python-logilab:
   image:
@@ -9,4 +20,3 @@
       --context $CI_PROJECT_DIR/library/python-logilab
       --dockerfile $CI_PROJECT_DIR/library/python-logilab/Dockerfile
       --destination $CI_REGISTRY_IMAGE/python-logilab
-      --build-arg python-version=3.8

library/buster-slim-pg11/Dockerfile

+FROM debian:buster-slim
+COPY apt.conf /etc/apt/apt.conf
+# this is required for some packages to install properly on "slim" images
+RUN for i in $(seq 1 8); do mkdir -p /usr/share/man/man$i; done
+RUN apt-get -y update && apt-get -y install wget ca-certificates gnupg && \
+	wget -O - https://apt.logilab.fr/key.asc | apt-key add - && \
+	echo "deb http://apt.logilab.fr buster-backports main" > /etc/apt/sources.list.d/logilab.list
+
+RUN echo 'Acquire::https::Proxy::deb.nodesource.com DIRECT;' >> /etc/apt/apt.conf && \
+	echo "deb https://deb.nodesource.com/node_10.x buster main" > /etc/apt/sources.list.d/nodesource.list && \
+ 	wget https://deb.nodesource.com/gpgkey/nodesource.gpg.key -O - | apt-key --keyring /etc/apt/trusted.gpg.d/nodesource.gpg add -
+
+RUN apt-get -y update && apt-get -y upgrade
+
+ENV PYTHONUNBUFFERED=1 \
+    PYTHONIOENCODING=UTF-8 \
+    LC_ALL=C.UTF-8 \
+    LANG=C.UTF-8 \
+    PIP_NO_CACHE_DIR=off
+RUN apt-get update && apt-get install -y --no-install-recommends \
+	apt-transport-https \
+	python3-pip \
+	python3-lxml \
+	python3-dev \
+	python3-psycopg2 \
+	python3-setuptools \
+	tox \
+	virtualenv \
+	postgresql \
+	postgresql-contrib \
+	postgresql-plpython3-11 \
+	postgresql-server-dev-11 \
+	postgis \
+	postgresql-11-postgis-2.5-scripts \
+	postgresql-11-postgis-2.5 \
+	apt-utils \
+	nodejs \
+	git \
+	sudo \
+	&& pg_dropcluster 11 main
+
+ENV PATH=/usr/lib/postgresql/11/bin/:$PATH
+
+RUN update-alternatives --install /usr/bin/python python /usr/bin/python3 50 && \
+    update-alternatives --install /usr/bin/pip pip /usr/bin/pip3 50
+
+RUN apt-get -t buster-backports install -y mercurial mercurial-evolve \
+	&& rm -rf /var/lib/apt/lists/*
+
+RUN useradd --create-home --user-group --shell /bin/bash user
+RUN echo "user   ALL=(ALL)       NOPASSWD:ALL" > /etc/sudoers.d/user
+USER user
+WORKDIR /home/user

library/buster-slim-pg11/apt.conf

+APT::Install-Recommends "0";
+APT::Install-Suggests "0";