Update README

Signed-off-by: HeshamTB <hishaminv@gmail.com>

README.md

@@ -1,15 +1,44 @@
 # hvpn-node3
 
+## Build
+```bash
+cd cmd/hvpn-node && go build .
 ```
-NAME:
-   ./hvpn-node - HVPN node API server
 
-USAGE:
-   ./hvpn-node [global options] [arguments...]
+## Run 
+With root (no recommended!)
+```bash
+sudo ./hvpn-node
+```
+Without root; using libcap
+```bash
+set_cap.sh && ./hvpn-node
+```
+The program creates a keys for the wireguad interface if non are given.
+The device name is `hvpn0`.
 
-AUTHOR:
-   Hesham T. Banafa <hishaminv@gmail.com>
+## Add a peer 
+```bash
+curl -X POST \
+    -d '{"public_key": "TxPfKra6/BQ2tkVXHM/PjeJgzX7j0I07acOn+2re/yI="}' \
+    localhost:8080/peer
+```
+Response body
+```json
+{
+  "mtu": 1380,
+  "public_key": "TxPfKra6/BQ2tkVXHM/PjeJgzX7j0I07acOn+2re/yI=",
+  "public_key_url_safe": "TxPfKra6%2FBQ2tkVXHM%2FPjeJgzX7j0I07acOn%2B2re%2FyI%3D",
+  "endpoint": "",
+  "allowed_ips": "10.42.0.1",
+  "presistent_keepalive": 25000000000,
+  "TX": 0,
+  "RX": 0
+}
+```
 
+## CLI options
+```
 GLOBAL OPTIONS:
    --log-level value            (default: "INFO") [$LOG_LEVEL]
    --private-key value          Path to file with private key
@@ -20,4 +49,12 @@ GLOBAL OPTIONS:
    --host value                 IP address to listen on for HTTP API requests (default: "0.0.0.0")
    --http-port value            TCP Port for HTTP API (default: 8080)
    --help, -h                   show help
+
+TLS:
+
+   --cert value                      Server x509 certificate file
+   --cert-private-key value          Server x509 certificate private key file
+   --client-certs value, --ca value  Clients x509 file with single or many certificates
+   --enable-tls, --tls               (default: false)
+
 ```

cmd/hvpn-node/hvpn-node.go

@@ -208,7 +208,7 @@ func createCliApp() *cli.App {
     mTLSClientCerts := cli.PathFlag{
         Name: "client-certs",
         Aliases: []string{"ca"},
-        Usage: "A path to PEM file with client certificates; Enables TLS",
+        Usage: "Clients x509 file with single or many certificates",
         Category: "\rTLS:",
     }
     app.Flags = append(app.Flags, &mTLSClientCerts)