[FIX] 11.0-13.0: use python image as base image

In order to have an up to date version of Python and therefore an up to
date pip version, the Python Docker image is used instead of the Debian
one.

The choosen Python Docker images are based on desired version of Debian.

This avoid to upgrade pip inside the image, that was resulting in a
useless copy of pip.

Author: d-fence

11.0/Dockerfile

@@ -1,4 +1,4 @@
-FROM debian:stretch
+FROM python:3.5-slim-stretch
 LABEL maintainer="Odoo S.A. <[email protected]>"
 
 # Generate locale C.UTF-8 for postgres and general locale data
@@ -54,7 +54,6 @@ RUN set -x; \
         && rm -rf /var/lib/apt/lists/* odoo.deb
 
 # Copy entrypoint script and Odoo configuration file
-RUN pip3 install --upgrade pip
 RUN pip3 install num2words xlwt phonenumbers
 COPY ./entrypoint.sh /
 COPY ./odoo.conf /etc/odoo/

12.0/Dockerfile

@@ -1,4 +1,4 @@
-FROM debian:stretch
+FROM python:3.5-slim-stretch
 LABEL maintainer="Odoo S.A. <[email protected]>"
 
 # Generate locale C.UTF-8 for postgres and general locale data
@@ -68,7 +68,6 @@ RUN set -x; \
         && rm -rf /var/lib/apt/lists/* odoo.deb
 
 # Copy entrypoint script and Odoo configuration file
-RUN pip3 install --upgrade pip
 RUN pip3 install num2words xlwt phonenumbers
 COPY ./entrypoint.sh /
 COPY ./odoo.conf /etc/odoo/

13.0/Dockerfile

@@ -1,4 +1,4 @@
-FROM debian:buster
+FROM python:3.7-slim-buster
 LABEL maintainer="Odoo S.A. <[email protected]>"
 
 # Generate locale C.UTF-8 for postgres and general locale data
@@ -59,7 +59,6 @@ RUN set -x; \
         && rm -rf /var/lib/apt/lists/* odoo.deb
 
 # Copy entrypoint script and Odoo configuration file
-RUN pip3 install --upgrade pip
 RUN pip3 install num2words xlwt phonenumbers
 COPY ./entrypoint.sh /
 COPY ./odoo.conf /etc/odoo/