Fix Dockerfile.arch base image error: Update archlinux/latest to archlinux

[tjsweetblack]

This pull request addresses an error in the Dockerfile.arch file caused by using an incorrect base image reference (archlinux/latest). The Docker Hub archlinux repository does not support a latest tag, which leads to a "failed to resolve source metadata" error during the Docker build process. This PR updates the base image reference to archlinux, resolving the error and allowing for a successful build.

Problem

The current Dockerfile uses archlinux/latest as the base image:

FROM archlinux/latest

Since archlinux/latest does not exist on Docker Hub, attempting to build this Dockerfile results in the following error:

ERROR: failed to solve: archlinux/latest: failed to resolve source metadata for docker.io/archlinux/latest:latest: pull access denied, repository does not exist or may require authorization: server message: insufficient_scope: authorization failed
Steps to Reproduce

Clone the repository.

_Run the following Docker build command:_

sudo docker build -t profanity -f Dockerfile.arch .

Observe the error indicating that archlinux/latest could not be found or accessed.

Fix

This PR modifies the Dockerfile.arch to use the correct base image, archlinux, without the non-existent latest tag:

FROM archlinux

Validation

After applying this fix, you can verify that the Docker image builds successfully:

_Run the updated build command:_

sudo docker build -t profanity -f Dockerfile.arch .

The build should complete without errors, and the profanity image will be created as expected.

Impact

This change ensures that the Docker build can complete successfully without requiring additional permissions or custom image sources. It aligns the Dockerfile with the official Arch Linux image structure on Docker Hub, improving compatibility and reliability for users.

[jubalh]

Hi! Generally write your commit messages in the present tense. And mention an issue that you fix in the commit body. In this case that would be #2004.
Please see https://github.com/profanity-im/profanity/blob/master/CONTRIBUTING.md for details.