Add route for index.html

spring-projects/spring-boot#9785

src/main/java/com/kapilkoju/nepse/data/ApplicationRoutes.java

@@ -0,0 +1,25 @@
+package com.kapilkoju.nepse.data;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.core.io.Resource;
+import org.springframework.http.MediaType;
+import org.springframework.web.reactive.function.server.RouterFunction;
+import org.springframework.web.reactive.function.server.ServerResponse;
+
+import static org.springframework.web.reactive.function.server.RequestPredicates.GET;
+import static org.springframework.web.reactive.function.server.RouterFunctions.route;
+import static org.springframework.web.reactive.function.server.ServerResponse.ok;
+
+@Configuration
+public class ApplicationRoutes {
+
+    // TODO: Not required after https://github.com/spring-projects/spring-boot/issues/9785
+    @Bean
+    public RouterFunction<ServerResponse> indexRouter(@Value("classpath:/static/index.html") final Resource indexHtml) {
+        return route(GET("/"),
+                request -> ok().contentType(MediaType.TEXT_HTML)
+                        .syncBody(indexHtml));
+    }
+}