test(docker): align build-contract test with pnpm fetch caching

src/lib/docker-build-contract.test.ts

@@ -6,18 +6,21 @@ const dockerfile = readFileSync("Dockerfile", "utf8");
 describe("Docker build cache", () => {
 	it("installs frozen dependencies before copying application source", () => {
 		const manifests = dockerfile.indexOf(
-			"COPY package.json *lock* pnpm-workspace.yaml .npmrc ./",
+			"COPY package.json pnpm-lock.yaml* ./",
 		);
+		const fetch = dockerfile.indexOf("pnpm fetch --ignore-scripts");
 		const install = dockerfile.indexOf("pnpm install --frozen-lockfile");
 		const source = dockerfile.indexOf("COPY . .");
 		expect(manifests).toBeGreaterThan(-1);
-		expect(install).toBeGreaterThan(manifests);
+		expect(fetch).toBeGreaterThan(manifests);
+		expect(install).toBeGreaterThan(fetch);
 		expect(source).toBeGreaterThan(install);
 	});
-	it("retains the package store and Next compiler cache across source changes", () => {
-		expect(dockerfile).toContain("id=epicnext-pnpm,target=/pnpm/store");
-		expect(dockerfile).toContain("--store-dir=/pnpm/store");
-		expect(dockerfile).toContain("id=epicnext-next,target=/app/.next/cache");
+	it("keeps dependency downloads in a lockfile-only cached layer", () => {
+		expect(dockerfile).toContain("pnpm fetch --ignore-scripts");
+		expect(dockerfile).toContain(
+			"pnpm install --frozen-lockfile --ignore-scripts --offline",
+		);
 	});
 	it("ships standalone output without a redundant dependency pruning step", () => {
 		expect(dockerfile).toContain("/app/.next/standalone ./");