build(frontend): add eslint

Makefile

@@ -312,6 +312,8 @@ frontend/src/env.sass:
 static: node_modules assets esbuild.config.mjs frontend/src/env.sass
 	npm run build
 well-known: static;
+--lint-frontend: --compile-frontend
+	npm run lint
 
 # HELP(compile-uniworxdb): clear and fill database. requires running postgres instance (use "make start-postgres" to start one)
 # TODO (db-m-$MIGRATION-backend): apply migration (see src/Model/Migration/Definition.hs for list of available migrations)

package.json

@@ -89,6 +89,7 @@
   },
   "scripts": {
     "build": "node esbuild.config.mjs",
-    "start": "node esbuild.config.mjs --watch"
+    "start": "node esbuild.config.mjs --watch",
+    "lint": "eslint ."
   }
 }