Basicrum community installer v0.0.5

Installer built from commit 4570f1ccc296cf6f674e2b90f76f54e745fb1f05.

Install or update with the same command:

curl -fsSL https://github.com/basicrum/basicrum-single-instance-community/releases/latest/download/install.sh | bash

This release makes the customer flow clearer: the installer prints the exact command to use again after setup, gives concise next steps, and uses the same command in its help and README. It bundles application image tag 0.0.1 for the backend, beacon service, and frontend.

Validated with 38 installer tests and a fresh Docker installation followed by a rerun. All six services passed healthchecks and the login endpoint returned HTTP 200. Download install.sh and install.sh.sha256 to verify with sha256sum --check install.sh.sha256.