Update N+ to R31 (#1501)

Author: sjberman

README.md

@@ -64,7 +64,7 @@ The following table lists the software versions NGINX Gateway Fabric supports.
 
 | NGINX Gateway Fabric | Gateway API | Kubernetes | NGINX OSS | NGINX Plus |
 |----------------------|-------------|------------|-----------|------------|
-| Edge                 | 1.0.0       | 1.23+      | 1.25.3    | R30        |
+| Edge                 | 1.0.0       | 1.23+      | 1.25.3    | R31        |
 | 1.1.0                | 1.0.0       | 1.23+      | 1.25.3    | n/a        |
 | 1.0.0                | 0.8.1       | 1.23+      | 1.25.2    | n/a        |
 | 0.6.0                | 0.8.0       | 1.23+      | 1.25.2    | n/a        |

build/Dockerfile.nginxplus

@@ -1,7 +1,7 @@
 # syntax=docker/dockerfile:1.4
-FROM alpine:3.18
+FROM alpine:3.19
 
-ARG NGINX_PLUS_VERSION=R30
+ARG NGINX_PLUS_VERSION=R31
 ARG NJS_DIR
 ARG NGINX_CONF_DIR
 ARG BUILD_AGENT

internal/mode/static/nginx/conf/nginx-plus.conf

@@ -50,3 +50,7 @@ http {
     }
   }
 }
+
+mgmt {
+  usage_report interval=0s;
+}