Project website + use Apalis crate for task queue (with redis backend)

instead channel and semaphore queue + upgrade to rust 1.99

scripts/build-website.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+IMAGE="docker.io/tintounn/steep-website"
+
+if [ -z "${CI_COMMIT_TAG:-}" ]; then
+    echo "Error: CI_COMMIT_TAG is not set" >&2
+    exit 1
+fi
+
+TAG="${CI_COMMIT_TAG}"
+IMAGE_REF="${IMAGE}:${TAG}"
+
+echo "Building ${IMAGE_REF}..."
+buildah build \
+    --file public/Containerfile \
+    --tag "${IMAGE_REF}" \
+    public
+
+echo "Pushing ${IMAGE_REF}..."
+buildah push "${IMAGE_REF}"
+
+echo "Done: ${IMAGE_REF}"