Update README for quick start with Docker and Docker Compose

Signed-off-by: Haitao Huang <4699115+haitaohuang@users.noreply.github.com>

Author: haitaohuang

README.md

@@ -29,14 +29,19 @@ Documentation
 - [Intel(R) SGX for Linux\* OS](https://01.org/intel-softwareguard-extensions) project home page on [01.org](https://01.org)
 - [Intel(R) SGX Programming Reference](https://software.intel.com/sites/default/files/managed/7c/f1/332831-sdm-vol-3d.pdf)
 
-Quick Start
+Quick Start with Docker and Docker Compose
 -----------------------------------------
-### Use Docker and Docker Compose
+
+- Build PSW and SDK from source. See this [README](docker/build/README.md) for details.
 ```
 $ cd docker/build && ./build_compose_run.sh
 ```
-See this [README](docker/build/README.md) for details.
 
+- Use prebuilt PSW and SDK downloaded from 01.org. See this [README](linux/installer/docker/README.md) for details.
+```
+$ cd linux/installer/docker && ./build_compose_run.sh
+```
+ 
 Build and Install the Intel(R) SGX Driver
 -----------------------------------------
 Follow the [README.md](https://github.com/intel/SGXDataCenterAttestationPrimitives/blob/master/driver/linux/README.md) in the [SGXDataCenterAttestationPrimitives](https://github.com/intel/SGXDataCenterAttestationPrimitives/) project to build and install the Intel(R) SGX driver.