fix: upgrade Docker build to Node 22 to resolve ESM require failure

[Copilot]

sass 1.102.0 depends on chokidar v5, which is ESM-only. The Docker build was installing Node 20.14.0 via tdnf install nodejs, which doesn't support require() of ESM modules — causing the Docker build to fail with ERR_REQUIRE_ESM.

Change

• Dockerfile: Replace nodejs with nodejs22 in the tdnf install step. Node 22.12+ added stable support for require() of synchronous ESM modules, resolving the incompatibility.

-# This is Node v16. For 18, use nodejs18.
+# Use nodejs22 for Node 22.x (required for ESM-compatible dependencies).
 RUN --mount=type=cache,id=try-tdnf,target=/var/cache/tdnf,sharing=locked \
-    tdnf install -y gawk nodejs npm
+    tdnf install -y gawk nodejs22 npm