add readme

README.md

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+# Step-by-Step examples for OpenShift PoC
+
+## Infrastructure Topics
+
+- [Custom HTTP Probe](Custom-HTTP-Probe/README.md)
+- [Debug in OpenShift](Debug-In-OpenShift/README.md)
+- [Read-only File System](Read-Only-FS/README.md)
+- [Login to OpenShift with your Google Account](Login-to-OpenShift-with-your-Google-Account/README.md)
+
+## Development Topics
+
+- [Using Skopeo](Using-Skopeo/README.md)