fix(webapp): add recommended security headers #3588

Job	Run time
typecheck / typecheck	6m 8s
e2e / 🧪 CLI v3 tests (windows-latest - pnpm)	5m 10s
e2e / 🧪 CLI v3 tests (ubuntu-latest - pnpm)	2m 25s
e2e / 🧪 CLI v3 tests (ubuntu-latest - npm)	2m 12s
units / packages / 🧪 Unit Tests: Packages (1, 1)	3m 56s
e2e / 🧪 CLI v3 tests (windows-latest - npm)	7m 36s
units / webapp / 🧪 Unit Tests: Webapp (3, 8)	2m 38s
units / webapp / 🧪 Unit Tests: Webapp (1, 8)	5m 29s
units / webapp / 🧪 Unit Tests: Webapp (2, 8)	3m 45s
units / webapp / 🧪 Unit Tests: Webapp (4, 8)	5m 37s
units / webapp / 🧪 Unit Tests: Webapp (5, 8)	2m 32s
units / internal / 🧪 Unit Tests: Internal (5, 8)	4m 6s
units / internal / 🧪 Unit Tests: Internal (4, 8)	4m 32s
units / internal / 🧪 Unit Tests: Internal (2, 8)	4m 26s
units / internal / 🧪 Unit Tests: Internal (1, 8)	5m 4s
units / webapp / 🧪 Unit Tests: Webapp (6, 8)	6m 59s
units / internal / 🧪 Unit Tests: Internal (3, 8)	4m 1s
units / webapp / 🧪 Unit Tests: Webapp (8, 8)	5m 35s
units / internal / 🧪 Unit Tests: Internal (8, 8)	1m 41s
units / webapp / 🧪 Unit Tests: Webapp (7, 8)	2m 4s
units / internal / 🧪 Unit Tests: Internal (7, 8)	4m 26s
units / internal / 🧪 Unit Tests: Internal (6, 8)	3m 8s
units / packages / 📊 Merge Reports	36s
units / internal / 📊 Merge Reports	26s
units / webapp / 📊 Merge Reports	40s
	1h 35m 12s

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