Add README

README.md

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+# NDN Operator
+
+**NDN Operator** is a Kubernetes operator that integrates [Named Data Networking](https://github.com/named-data) into your Kubernetes cluster
+
+## Architecture
+```mermaid
+flowchart TB
+  subgraph N[Network]
+  direction LR
+    subgraph n_A[Node A]
+    direction TB
+      app_a1[Container 1]:::dotted <--unix socket--> ndnd_a[NDN daemon]
+    end
+    subgraph n_B[Node B]
+    direction TB
+      app_b2[Container 2]:::dotted <--unix socket--> ndnd_b[NDN daemon]
+    end
+    subgraph n_C[Node C]
+    direction TB
+      app_b3[Container 3]:::dotted <--unix socket--> ndnd_c[NDN daemon]
+    end
+    n_A <--ip--> n_B <--ip--> n_C
+  end
+  subgraph operator[NDN Operator]
+  direction LR
+  controller --watch--> C@{ shape: docs, label: "K8S Resources"}
+  end
+  operator --manage--> N
+  classDef dotted stroke-dasharray: 5 5
+```
+
+## Features
+* Multiple networks per cluster
+* TLS management for ndnd
+* Multi-cluster support
+
+## Roadmap
+1. Basic functionality
+    * `Network` resource that creates a simple unsecured network
+    * Pod annotations, assigning it to a particular network
+1. TLS
+    * Self-signed root CA
+1. Advanced use
+    * Expose NDN faces outside
+    * Obtain certificates from Testbed
+    * K8S resources to manage NDN faces, strategies and links