feat: add doc on how to use different connection modes

README.md

@@ -36,6 +36,10 @@
         - [Emulator](#emulator-android--ios)
         - [Android](#android-device)
         - [iOS](#ios-device)
+- [How to Use](#how-to-use)
+    - [cln_grpc](#cln-grpc)
+    - [lnlambda](#lnlambda)
+    - [cln_rpc](#cln-rpc)
 - [How to Contribute](#how-to-contribute)
 - [License](#license)
 
@@ -117,6 +121,33 @@ flutter build ipa
 
 - The Xcode build archive (.xcarchive file) generated can be found inside `[project]/build/ios/archive/` directory and an App Store app bundle (.ipa file) in `[project]/build/ios/ipa/`
 
+## How to Use
+
+### CLN gRPC
+
+- Launch the app
+- In connection type dropdown, select `ClientMode.grpc`
+- Provide the directory path consisting of the TLS Certificate\
+  Example: `/ssd/home/usr/lnd`. The lnd folder consists of the TLS Cert file
+- Enter the host alongside the port of your lightning node. You can find it by running `lightning-cli getinfo`\
+  Example: `120.154.200.80:19735`
+
+
+### LN Lambda
+
+- Launch the app
+- In connection type dropdown, select `ClientMode.lnlambda`
+- Type in the node id and host (alongside the port). You can find both the values by running `lightning-cli getinfo`
+- For the Lambda Server field, type in `https://lnlambda.lnmetrics.info`
+- Type in the rune. If you don't exactly know what a rune is, you can generate one by running `lightning-cli createrune`. If you have already generated a rune in the past and want to use that only, then you can find the past runes by running `lightning-cli showrunes`.
+
+### CLN RPC
+
+- Launch the app
+- In connection type dropdown, select `ClientMode.unixSocket`
+- Provide the directory path consisting of the lightning-rpc file. You will mostly find it in the .lightning folder\
+  Example: `/home/usr/xyz/.lightning/`
+
 
 ## How to Contribute