fix(frontend): clean up build warnings (#12508)

frontend/.env.production

@@ -1,4 +1,3 @@
-NODE_ENV = "production"
 VITE_API_URL = '/api/v2'
 VITE_REPORT = true
 VITE_BUILD_GZIP = false

frontend/src/views/setting/alert/dash/index.vue

@@ -324,7 +324,7 @@ onMounted(() => {
     flex-wrap: wrap;
     gap: 10px;
     flex: 1 1 auto;
-    justify-content: start;
+    justify-content: flex-start;
 }
 
 .search-fields {

frontend/vite.config.ts

@@ -54,6 +54,7 @@ const __APP_INFO__ = {
 export default defineConfig(({ mode }: ConfigEnv): UserConfig => {
     const env = loadEnv(mode, process.cwd());
     const viteEnv = wrapperEnv(env);
+    const isProduction = mode === 'production';
 
     return {
         resolve: {
@@ -127,7 +128,7 @@ export default defineConfig(({ mode }: ConfigEnv): UserConfig => {
         ],
         esbuild: {
             pure: viteEnv.VITE_DROP_CONSOLE ? ['console.log'] : [],
-            drop: viteEnv.VITE_DROP_CONSOLE && process.env.NODE_ENV === 'production' ? ['debugger'] : [],
+            drop: viteEnv.VITE_DROP_CONSOLE && isProduction ? ['debugger'] : [],
         },
         build: {
             sourcemap: false,