add prettier and eslint

.prettierignore

@@ -0,0 +1,14 @@
+.DS_Store
+node_modules
+/docs
+/build
+/.svelte-kit
+/package
+.env
+.env.*
+!.env.example
+
+# Ignore files for PNPM, NPM and YARN
+pnpm-lock.yaml
+package-lock.json
+yarn.lock

.prettierrc

@@ -0,0 +1,21 @@
+{
+	"svelteStrictMode": false,
+	"svelteAllowShorthand": true,
+	"svelteIndentScriptAndStyle": true,
+	"semi": false,
+	"useTabs": true,
+	"singleQuote": true,
+	"trailingComma": "none",
+	"arrowParens": "avoid",
+	"bracketSameLine": false,
+	"plugins": ["prettier-plugin-svelte"],
+	"pluginSearchDirs": ["."],
+	"overrides": [
+		{
+			"files": "*.svelte",
+			"options": {
+				"parser": "svelte"
+			}
+		}
+	]
+}

package.json

@@ -5,23 +5,39 @@
   "scripts": {
     "dev": "vite dev",
     "build": "vite build",
-    "preview": "vite preview"
+    "preview": "vite preview",
+    "lint": "prettier --plugin-search-dir . --check . && eslint .",
+    "format": "prettier --plugin-search-dir . --write ."
   },
   "devDependencies": {
     "@sveltejs/adapter-auto": "^2.0.0",
     "@sveltejs/kit": "next",
     "autoprefixer": "^10.4.7",
+    "eslint": "^8.35.0",
+    "eslint-config-prettier": "^8.7.0",
+    "eslint-plugin-svelte3": "^4.0.0",
     "leaflet": "^1.9.2",
     "postcss": "^8.4.14",
     "postcss-load-config": "^4.0.1",
+    "prettier": "^2.8.4",
+    "prettier-plugin-svelte": "^2.9.0",
     "svelte": "^3.44.0",
     "svelte-preprocess": "^4.10.7",
     "vite": "^4.0.0"
   },
-  "type": "module",
   "dependencies": {
     "geoip-lite": "^1.4.7",
     "psl": "^1.9.0",
     "whoiser": "^1.16.0"
-  }
+  },
+  "eslintConfig": {
+    "extends": [
+      "@sveltejs",
+      "prettier"
+    ],
+    "ignorePatterns": [
+      "docs/*"
+    ]
+  },
+  "type": "module"
 }