Update README.md with usage

Author: samvarankashyap

README.md

@@ -1,2 +1,49 @@
 # operator-bundle-validate-container
 CVP midstream operator bundle validate container
+
+# Usage
+
+## Building image on local machine 
+
+```
+git clone https://github.com/redhat-operator-ecosystem/operator-bundle-validate-container
+cd operator-bundle-validate-container
+### podman build -t <image_name>:<tagname> -f <filepath>
+podman build -t midstream_image:latest -f Dockerfile
+```
+
+## Running image with operator bundle
+
+```
+podman run -it -v <operator_bundle_dir>:/project/operator-bundle -v <output_log>:/project/output --security-opt label=disable <imagename>:<tagname>
+
+podman run -it -v ./example-bundle:/project/operator-bundle -v ./output_logs:/project/output --security-opt label=disable midstream:latest 
+```
+
+### Note:
+Example operator bundle tree looks as follows:
+```
+example-bundle
+├── manifests
+│   ├── clusterresourceoverride.crd.yaml
+│   └── clusterresourceoverride-operator.v4.6.0.clusterserviceversion.yaml
+└── metadata
+    └── annotations.yaml
+```
+
+#### Example Output of the container 
+```
+operatorSDKVersion is operator-sdk version: "v1.4.0", commit: "67f9c8b888887d18cd38bb6fd85cf3cf5b94fd99", kubernetes version: "1.19.4", go version: "go1.15.5", GOOS: "linux", GOARCH: "amd64"
+Operator bundle validation Return Code is 0
+Operator bundle Validation output is 
+ time="2021-02-12T01:16:57Z" level=debug msg="Debug logging is set"
+time="2021-02-12T01:16:57Z" level=debug msg="Found manifests directory" bundle-dir=../operator-bundle container-tool=docker
+time="2021-02-12T01:16:57Z" level=debug msg="Found metadata directory" bundle-dir=../operator-bundle container-tool=docker
+time="2021-02-12T01:16:57Z" level=debug msg="Getting mediaType info from manifests directory" bundle-dir=../operator-bundle container-tool=docker
+time="2021-02-12T01:16:57Z" level=info msg="Found annotations file" bundle-dir=../operator-bundle container-tool=docker
+time="2021-02-12T01:16:57Z" level=info msg="Could not find optional dependencies file" bundle-dir=../operator-bundle container-tool=docker
+time="2021-02-12T01:16:57Z" level=debug msg="Validating bundle contents" bundle-dir=../operator-bundle container-tool=docker
+time="2021-02-12T01:16:57Z" level=info msg="All validation tests have completed successfully"
+
+Bundle image validation is successful
+```