Upgrade Python version used by official Datasette Docker image

[simonw]

Currently uses 3.7.2:

datasette/Dockerfile

Line 1 in 73bed17

FROM python:3.7.2-slim-stretch as build

There's a security fix for Python which it would be good to ship in this image (even though I'm reasonably confident it doesn't affect Datasette): https://bugs.python.org/issue42938

[simonw]

I'll bump to 3.7.10 for the moment - the fix for 3.8 isn't out until March 1st according to https://news.ycombinator.com/item?id=26186434

https://www.python.org/downloads/release/python-3710/

[simonw]

I bumped the two lines in the Dockerfile to FROM python:3.7.10-slim-stretch as build and ran this to build it:

docker build -f Dockerfile -t datasetteproject/datasette:python-3-7-10 .

Then I ran it with:

docker run -p 8001:8001 -v `pwd`:/mnt datasetteproject/datasette:python-3-7-10 datasette -p 8001 -h 0.0.0.0 /mnt/fixtures.db

http://0.0.0.0:8001/-/versions confirmed that it was now running Python 3.7.10