Fix broken links

Author: smokestacklightnin

tensorflow_serving/g3doc/serving_advanced.md

@@ -31,7 +31,7 @@ This tutorial steps through the following tasks:
 4.  Serve request with TensorFlow Serving `ServerCore`.
 5.  Run and test the service.
 
-Before getting started, first [install Docker](docker.md#installing-docker)
+Before getting started, first [install Docker](docker.md#install-docker)
 
 ## Train and export TensorFlow Model
 

tensorflow_serving/g3doc/serving_basic.md

@@ -22,7 +22,7 @@ The code for this tutorial consists of two parts:
     The TensorFlow Serving ModelServer discovers new exported models and runs a
     [gRPC](http://www.grpc.io) service for serving them.
 
-Before getting started, first [install Docker](docker.md#installing-docker).
+Before getting started, first [install Docker](docker.md#install-docker).
 
 ## Train and export TensorFlow model
 

tensorflow_serving/g3doc/serving_kubernetes.md

@@ -18,7 +18,7 @@ To learn more about TensorFlow ResNet model, we recommend reading
 
 ## Part 1: Setup
 
-Before getting started, first [install Docker](docker.md#installing-docker).
+Before getting started, first [install Docker](docker.md#install-docker).
 
 ### Download the ResNet SavedModel