feat(docker): prepare portable images with runtime hotel configuration

src/lib/runtime-avatar-route.test.ts

@@ -0,0 +1,44 @@
+import { NextRequest } from "next/server";
+import { afterEach, expect, it, vi } from "vitest";
+import { GET } from "../app/api/imaging/avatar/route";
+
+afterEach(() => {
+	vi.unstubAllEnvs();
+	vi.unstubAllGlobals();
+});
+it("forwards multicolor figures and preserves configured query options at runtime", async () => {
+	const figure = "hr-11782-40-40.hd-180-7-14.ch-11592-66.lg-10726-79-1408";
+	const fetcher = vi.fn(
+		async (_input: string | URL) =>
+			new Response(new Uint8Array([1, 2, 3]), {
+				headers: { "content-type": "image/png" },
+			}),
+	);
+	vi.stubGlobal("fetch", fetcher);
+	for (const hotel of ["alpha", "beta"]) {
+		vi.stubEnv("IMAGER_URL", `https://${hotel}.test/avatar?renderer=custom`);
+		const result = await GET(
+			new NextRequest(
+				`https://hotel.test/api/imaging/avatar?figure=${figure}&headonly=1&effect=0`,
+			),
+		);
+		expect(result.status).toBe(200);
+		const target = new URL(String(fetcher.mock.calls.at(-1)?.[0]));
+		expect(target.origin).toBe(`https://${hotel}.test`);
+		expect(target.searchParams.get("figure")).toBe(figure);
+		expect(target.searchParams.get("renderer")).toBe("custom");
+		expect(target.searchParams.get("headonly")).toBe("1");
+	}
+});
+it("rejects malformed figure input without contacting a renderer", async () => {
+	const fetcher = vi.fn();
+	vi.stubGlobal("fetch", fetcher);
+	expect(
+		(
+			await GET(
+				new NextRequest("https://hotel.test/api/imaging/avatar?figure=../bad"),
+			)
+		).status,
+	).toBe(400);
+	expect(fetcher).not.toHaveBeenCalled();
+});