test: add pi-hole test container integration test (#649)

* test: add pi-hole test container integration test

* chore: improve waiting logic for test container

* refactor: improve structure of pi hole test

* fix: eslint does not recognize test directory to be part of tsconfig

package.json

@@ -35,6 +35,7 @@
     "cross-env": "^7.0.3",
     "jsdom": "^24.1.0",
     "prettier": "^3.3.1",
+    "testcontainers": "^10.9.0",
     "turbo": "^2.0.3",
     "typescript": "^5.4.5",
     "vite-tsconfig-paths": "^4.3.2",