This allows a dev environment for the the repository to be automatically
created by vscode (or other devcontainer-using tools). It works with
both local filesystem bind mount workspaces, and named container volumes.

When the workspace/git checkout is a container volume, it can't be
mounted with a regular bind mount, as the compose config needs to know
the volume name, mount point, and subdirectory within the mount point to
use as the working directory.

This commit allows these 3 options to be configured using environment
variables, so that a devcontainer config can override the guidebook
service mounts to reference the devcontainer's volume. The defaults
continue to use the local bind mount, so using the compose config without
additional configuration will work as before.

Docker compose CLI now warns if a config contains a version property.

When the workspace/git checkout is a container volume it's tricky to
mount a single file from the volume into the plantuml container. However
referencing the file when building the image is simple, so the logging
config is now baked into the image at build time.

feat: Add mkdocs-exclude and exclude non-presentation markdown pages....

Closes #295

See merge request !437

feat: Add mkdocs-exclude and exclude non-presentation markdown pages. Separated nav configuration vs other mkdocs configuration

chore: Add jetty-logging.properties and usage thereof in docker-compose...

See merge request !436

docs: update Dig. Admissions people (MyCApp & Digital Pooling)

See merge request !435

chore: Add jetty-logging.properties and usage thereof in docker-compose configuration to eliminate large number of WARN log lines from plantuml container

docs: Add Drupal team and fix Hopper team

See merge request !433

Co-authored-by: Monty Dawson <wgd23@cam.ac.uk>

fix(best-practice/python): add relative link instead of hard-coded URL

See merge request !431

docs: Add all finalised tech lead forum standards

See merge request !430

Link the Python best practice page to the Creating a Python package page which contains a larger explanation of our Python code style and enforced checks

chore(activate-account): update URLs for frontend

See merge request !429

Updated tech details for HR Systems - TES and RAS

See merge request !428

chore(hrsystems): Correct environment details for WRS, RAS, HR Int training and dev instances

See merge request !427

Updated WRS tech details

See merge request !423

Added missing requirements to Java Common pipeline page

See merge request !420

feat: Add libraries-tools top-level section & pages

See merge request !426

feat: add how to for mac os preparation for running ansible deployments

Closes #291

See merge request !424

feat(user-notify): add link to SES reputation metrics dashboard

See merge request !425

feat(renovatebot): document terraform release management

Closes #289

See merge request !421