Add a devcontainer configuration (#4969)

.devcontainer/on-create-command.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+set -e
+
+python3 -m venv .venv
+. .venv/bin/activate
+pip install -U pip setuptools wheel
+pip install -r requirements/dev.txt
+pip install -e .
+pre-commit install --install-hooks