fix(#198): add configurable POSTGRES_PORT to docker compose file

[rmayore]

Description

Adds configurable PG port

Code review checklist

• Readable: Concise, well named, follows the style guide, documented if necessary.
• Documented: Configuration and user documentation on cht-docs
• Tested: Unit and/or e2e where appropriate
• Backwards compatible: Works with existing data and configuration or includes a migration. Any breaking changes documented in the release notes.

License

The software is provided under AGPL-3.0. Contributions to this project are accepted under the same license.

[jkuester]

Everywhere that is currently referencing 5432 in the code is also checking the POSTGRES_PORT value. Additionally, the env.template file already has an entry for POSTGRES_PORT. So, I believe this change should be good to go!

(I am assuming this previous hard-coded configuration in the docker-compose was just an oversight that was made when overhauling everything to just use couch2pg.)

[medic-ci]

🎉 This PR is included in version 1.3.3 🎉

The release is available on GitHub release

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