fix(fastify): Dont fallback to index html if requesting static assets #26633

Job	Run time
📖 Only doc changes?	54s
✅ Check constraints, dependencies, and package.json's	17s
✅ Check constraints, dependencies, and package.json's	0s
🏗 Build, lint, test / ${{ matrix.os }} / node 18 latest	0s
🌲 Tutorial E2E / ${{ matrix.os }} / node 18 latest	0s
🔄 Smoke test / ${{ matrix.os }} / node 18 latest	0s
🔭 Telemetry check / ${{ matrix.os }} / node 18 latest	0s
🐘 RSC related changes?	43s
🏗 Build, lint, test / ubuntu-latest / node 18 latest	4m 36s
🏗 Build, lint, test / windows-latest / node 18 latest	10m 6s
🔭 Telemetry check / ubuntu-latest / node 18 latest	2m 31s
🔄 Smoke tests / ubuntu-latest / vite / node 18 latest	8m 8s
🌲 Tutorial E2E / vite / node 18 latest	8m 40s
🔭 Telemetry check / windows-latest / node 18 latest	5m 10s
🔄 Smoke tests / ubuntu-latest / webpack / node 18 latest	10m 1s
🌲 Tutorial E2E / webpack / node 18 latest	8m 51s
🔄 Smoke tests / windows-latest / vite / node 18 latest	17m 10s
🔄 Smoke tests / windows-latest / webpack / node 18 latest	19m 16s
🔄🐘 RSC Smoke tests / ubuntu-latest	1s
🔄🐘 RSC Smoke tests / windows-latest	3s
🔄🐘 RSC Smoke tests / ${{ matrix.os }}	0s
	1h 36m 27s

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