add Ubuntu 24.04 Dockerfile example

docs/pipelines/agents/docker.md

@@ -241,6 +241,35 @@ Next, create the Dockerfile.
       ENTRYPOINT [ "./start.sh" ]
       ```
 
+    * For Ubuntu 24.04:
+      ```dockerfile
+      FROM ubuntu:24.04
+      ENV TARGETARCH="linux-x64"
+      # Also can be "linux-arm", "linux-arm64".
+
+      RUN apt update && \
+        apt upgrade -y && \
+        apt install -y curl git jq libicu74
+
+      # Install Azure CLI
+      RUN curl -sL https://aka.ms/InstallAzureCLIDeb | bash
+
+      WORKDIR /azp/
+
+      COPY ./start.sh ./
+      RUN chmod +x ./start.sh
+
+      # Create agent user and set up home directory
+      RUN useradd -m -d /home/agent agent
+      RUN chown -R agent:agent /azp /home/agent
+
+      USER agent
+      # Another option is to run the agent as root.
+      # ENV AGENT_ALLOW_RUNASROOT="true"
+
+      ENTRYPOINT [ "./start.sh" ]
+      ```
+
     * For Ubuntu 22.04:
       ```dockerfile
       FROM ubuntu:22.04