diff --git a/serving/samples/helloworld-clojure/Dockerfile b/serving/samples/helloworld-clojure/Dockerfile
index 1f0491b4b..8b8e0894e 100644
--- a/serving/samples/helloworld-clojure/Dockerfile
+++ b/serving/samples/helloworld-clojure/Dockerfile
@@ -1,20 +1,21 @@
-# Start from a Debian image with the latest version of Clojure installed.
+# Use the official Clojure image.
+# https://hub.docker.com/_/clojure
 FROM clojure
 
 # Create the project and download dependencies.
-RUN mkdir -p /usr/src/app
 WORKDIR /usr/src/app
-COPY project.clj /usr/src/app/
+COPY project.clj .
 RUN lein deps
 
-# Copy the local package files inside the container.
-COPY . /usr/src/app
+# Copy local code to the container image.
+COPY . .
 
-# Build the app as an uberjar.
+# Build an uberjar release artifact.
 RUN mv "$(lein uberjar | sed -n 's/^Created \(.*standalone\.jar\)/\1/p')" app-standalone.jar
 
-# Run the app by default when the container starts.
-CMD ["java", "-jar", "app-standalone.jar"]
+# Configure and document the service HTTP port.
+ENV PORT 8080
+EXPOSE $PORT
 
-# Document that the service listens on port 8080.
-EXPOSE 8080
\ No newline at end of file
+# Run the web service on container startup.
+CMD ["java", "-jar", "app-standalone.jar"]
diff --git a/serving/samples/helloworld-clojure/README.md b/serving/samples/helloworld-clojure/README.md
index bc0ece4df..97f41e058 100644
--- a/serving/samples/helloworld-clojure/README.md
+++ b/serving/samples/helloworld-clojure/README.md
@@ -58,26 +58,27 @@ following instructions recreate the source files from this folder.
    [the clojure image documentation](https://github.com/docker-library/docs/tree/master/clojure).
 
     ```docker
-    # Start from a Debian image with the latest version of Clojure installed.
+    # Use the official Clojure image.
+    # https://hub.docker.com/_/clojure
     FROM clojure
 
     # Create the project and download dependencies.
-    RUN mkdir -p /usr/src/app
     WORKDIR /usr/src/app
-    COPY project.clj /usr/src/app/
+    COPY project.clj .
     RUN lein deps
 
-    # Copy the local package files inside the container.
-    COPY . /usr/src/app
+    # Copy local code to the container image.
+    COPY . .
 
-    # Build the app as an uberjar.
+    # Build an uberjar release artifact.
     RUN mv "$(lein uberjar | sed -n 's/^Created \(.*standalone\.jar\)/\1/p')" app-standalone.jar
 
-    # Run the app by default when the container starts.
-    CMD ["java", "-jar", "app-standalone.jar"]
+    # Configure and document the service HTTP port.
+    ENV PORT 8080
+    EXPOSE $PORT
 
-    # Document that the service listens on port 8080.
-    EXPOSE 8080
+    # Run the web service on container startup.
+    CMD ["java", "-jar", "app-standalone.jar"]
     ```
 
 1. Create a new file, `service.yaml` and copy the following service definition