Refactor menu data for leaf sections (#894)

config.yaml

@@ -92,22 +92,13 @@ outputs:
 
 menu:
   main:
-    - name: About
-      url: /about/
-      weight: 1
     - name: Docs
       url: /docs/
       identifier: docs
       weight: 2
-    - name: Showcase
-      url: /showcase/
-      weight: 3
     - name: Blog
       url: /blog/
       weight: 4
-    - name: Community
-      url: /community/
-      weight: 5
     - name: Overview
       url: /docs/
       weight: 1

content/en/about/_index.md

@@ -1,6 +1,9 @@
 ---
 title: About gRPC
+linkTitle: About
 description: Who is using gRPC and why
+menu:
+  main: {weight: 1}
 ---
 
 {{< blocks/cover image_anchor="top" height="sm" color="primary" >}}

content/en/community/_index.md

@@ -42,6 +42,8 @@ community_resources:
     desc: >
       Missed a meeting? No problem. Visit the [gRPC channel][grpc-youtube] for
       meeting videos.
+menu:
+  main: {weight: 5}
 ---
 
 {{< blocks/cover color="primary" height="sm" >}}

content/en/showcase/_index.md

@@ -15,6 +15,8 @@ customer_success_stories:
     desc: >
       How the productivity software company Nulab boosted its own productivity
       with microservices and Kubernetes.
+menu:
+  main: {weight: 3}
 ---
 
 {{< blocks/cover height="sm" color="primary" >}}