Merge branch 'HOLI-5939-fix-goodnews-language-header' into 'main'

HOLI-5939: Fix usage of accept-language header

See merge request app/holi-app-goodnews!30

app/server.ts

@@ -118,9 +118,8 @@ export const createGraphQLServer = (config: ServerConfig): GraphQLServer => {
     graphiql: true,
     plugins,
     context: (context: GraphQLContext) => {
-      const languages = (context.params?.extensions?.headers || {})[
-        "accept-language"
-      ];
+      const headers = new Headers(context.params?.extensions?.headers);
+      const languages = headers.get("accept-language") || DEFAULT_LANGUAGE;
       return {
         ...context,
         language: getLanguage(languages),