ci: add lhci assertions

Author: lishaduck

.github/workflows/deno.yaml

@@ -78,3 +78,4 @@ jobs:
             ${{ steps.deno-deploy.outputs.url }}solutions/geothermal/environment/
             ${{ steps.deno-deploy.outputs.url }}calculator/
           uploadArtifacts: true
+          configPath: lighthouserc.json

lighthouserc.json

@@ -0,0 +1,8 @@
+{
+  "$schema": "https://gist.githubusercontent.com/jfhr/181123d7acc87ea329be3700d9c37594/raw/9dafefb638f8ff0660930cc48debefa1dfcd87ca/lighthouserc.schema.json",
+  "ci": {
+    "assert": {
+        "preset": "lighthouse:recommended"
+    }
+  }
+}