Setup baseline docker-compose.yml configuration with Apache web server, latest WordPress, with a mySQL db

Fixes

Fixes #199 by @possumbilities

Description

[x] setup MySQL server (MariaDB)
[x] setup a web server (Apache), running latest WordPress files
[x] make Web and DB server connect with each other appropriately
[x] mount the db locally, so it persists
- [x] mount the WordPress install locally, so it persists
- [x] mount the wp-plugin-creativecommons plugin directory into the web server at wp-content/plugins/, so it can be user activated
- [x] include appropriate .gitignore additions so local mount points are not tracked ( ./dev/db & ./dev/wordpress)
- [x] update documentation to reflect new docker compose one-liner referencing docker-compose.yml file

Note: the docker-compose.yml file has been placed initially within the ./dev/ directory, rather than the project root, since that folder seems to have several dev related files already.

Tests

Tested manually, locally, verified it works as expected.

Checklist

- [x] My pull request has a descriptive title (not a vague title like `Update index.md`). - [x] My pull request targets the *default* branch of the repository (`main` or `master`). - [x] My commit messages follow [best practices][best_practices]. - [x] My code follows the established code style of the repository. - [ ] I added or updated tests for the changes I made (if applicable). - [x] I added or updated documentation (if applicable). - [x] I tried running the project locally and verified that there are no visible errors. [best_practices]:https://gist.github.com/robertpainsi/b632364184e70900af4ab688decf6f53 ## Developer Certificate of Origin

For the purposes of this DCO, "license" is equivalent to "license or public domain dedication," and "open source license" is equivalent to "open content license or public domain dedication."

Developer Certificate of Origin

``` Developer Certificate of Origin Version 1.1 Copyright (C) 2004, 2006 The Linux Foundation and its contributors. 1 Letterman Drive Suite D4700 San Francisco, CA, 94129 Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Developer's Certificate of Origin 1.1 By making a contribution to this project, I certify that: (a) The contribution was created in whole or in part by me and I have the right to submit it under the open source license indicated in the file; or (b) The contribution is based upon previous work that, to the best of my knowledge, is covered under an appropriate open source license and I have the right under that license to submit that work with modifications, whether created in whole or in part by me, under the same open source license (unless I am permitted to submit under a different license), as indicated in the file; or (c) The contribution was provided directly to me by some other person who certified (a), (b) or (c) and I have not modified it. (d) I understand and agree that this project and the contribution are public and that a record of the contribution (including all personal information I submit with it, including my sign-off) is maintained indefinitely and may be redistributed consistent with this project or the open source license(s) involved. ```

creativecommons / wp-plugin-creativecommons