[skip-ci] In .devcontainer/Dockerfile: pipx install pre-commit ruff (#8893)

[skip-ci] In .devcontainer/Dockerfile: pipx install pre-commit ruff

Author: cclauss

Diff for: .devcontainer/Dockerfile

@@ -3,4 +3,6 @@ ARG VARIANT=3.11-bookworm
 FROM mcr.microsoft.com/vscode/devcontainers/python:${VARIANT}
 COPY requirements.txt /tmp/pip-tmp/
 RUN python3 -m pip install --upgrade pip \
-  && python3 -m pip install --no-cache-dir install ruff -r /tmp/pip-tmp/requirements.txt
+  && python3 -m pip install --no-cache-dir install -r /tmp/pip-tmp/requirements.txt \
+  && pipx install pre-commit ruff \
+  && pre-commit install