Changed dockerfile to containerfile in readme

Author: adhrames

OracleSOASuite/dockerfiles/README.md

@@ -14,7 +14,7 @@ Consider using the open source [WebLogic Kubernetes Operator](<https://docs.orac
 ## SOA 12.2.1.x Containerfile image Creation and Running
 
 To build a SOA image either you can start from building Oracle JDK and Oracle Fusion Middleware Infrastrucure image or use the already available Oracle Fusion Middleware Infrastructure image. The Fusion Middleware Infrastructure image is available in the [Oracle Container Registry](https://container-registry.oracle.com), and can be pulled from there.
-If you plan to use the Oracle Fusion Middleware Infrastructure image from the [Oracle Container Registry](https://container-registry.oracle.com), you can skip the next two steps and continue with "Building a Containerfile Image for SOA".
+If you plan to use the Oracle Fusion Middleware Infrastructure image from the [Oracle Container Registry](https://container-registry.oracle.com), you can skip the next two steps and continue with "Building a Container image for SOA".
 
 >NOTE: If you download the Oracle Fusion Middleware Infrastructure image from the [Oracle Container Registry](https://container-registry.oracle.com) then you need to retag the image with appropriate version. e.g. for the 12.2.1.4 version, retag from `container-registry.oracle.com/middleware/fmw-infrastructure:12.2.1.4` to `oracle/fmw-infrastructure:12.2.1.4.0`.