Add build from source instructions in README

Signed-off-by: Harshal Patil <harpatil@redhat.com>

README.md

@@ -18,7 +18,8 @@ An operator to perform lifecycle management (install/upgrade/uninstall) of [Kata
 3. Install the Kata Operator on the cluster,
 
    ```
-   make install && make install && make deploy IMG=quay.io/harpatil/kata-operator:0.4
+   make install && make deploy IMG=quay.io/harpatil/kata-operator:0.4
+   oc adm policy add-scc-to-user privileged -z default -n kata-operator-system
    ```
 4. To begin the installation of the kata runtime on the cluster,
 
@@ -110,5 +111,4 @@ Not implemented yet
 # Build from source
 
 1. Install operator-sdk version 1.0 or above
-3. operator-sdk build quay.io/<yourusername>/kata-operator:v1.0
-4. podman push quay.io/<yourusername>/kata-operator:v1.0
+2. make docker-build docker-push IMG=quay.io/<yourusername>/kata-operator:<tag>