Improve error handling

apps/api/src/middlewares/html-template.middleware.ts

@@ -97,20 +97,29 @@ export class HtmlTemplateMiddleware implements NestMiddleware {
   private indexHtmlMap: { [languageCode: string]: string } = {};
 
   public constructor(private readonly i18nService: I18nService) {
+    if (!environment.production) {
+      return;
+    }
+
+    this.indexHtmlMap = SUPPORTED_LANGUAGE_CODES.reduce((map, languageCode) => {
+      const indexHtmlPath = join(
+        __dirname,
+        '..',
+        'client',
+        languageCode,
+        'index.html'
+      );
+
       try {
-      this.indexHtmlMap = SUPPORTED_LANGUAGE_CODES.reduce(
+        map[languageCode] = readFileSync(indexHtmlPath, 'utf8');
-        (map, languageCode) => ({
+      } catch {
-          ...map,
+        this.logger.warn(
-          [languageCode]: readFileSync(
+          `Skipping language '${languageCode}': ${indexHtmlPath} not found`
-            join(__dirname, '..', 'client', languageCode, 'index.html'),
-            'utf8'
-          )
-        }),
-        {}
         );
-    } catch (error) {
-      this.logger.error('Failed to initialize index HTML map', error);
       }
+
+      return map;
+    }, {});
   }
 
   public use(request: Request, response: Response, next: NextFunction) {