Update README (#1881)

Author: pm47

README.md

@@ -7,17 +7,25 @@
 
 **Eclair** (French for Lightning) is a Scala implementation of the Lightning Network.
 
-This software follows the [Lightning Network Specifications (BOLTs)](https://github.com/lightningnetwork/lightning-rfc). Other implementations include [c-lightning](https://github.com/ElementsProject/lightning) and [lnd](https://github.com/LightningNetwork/lnd).
+This software follows the [Lightning Network Specifications (BOLTs)](https://github.com/lightningnetwork/lightning-rfc). Other implementations include [c-lightning](https://github.com/ElementsProject/lightning), [lnd](https://github.com/LightningNetwork/lnd), [electrum](https://github.com/spesmilo/electrum/), and [rust-lightning](https://github.com/rust-bitcoin/rust-lightning).
 
 ---
-
-:construction: Both the BOLTs and Eclair itself are still a work in progress. Expect things to break/change!
-
-:rotating_light: If you run Eclair on mainnet (which is the default setting):
-
-* Keep in mind that it is beta-quality software and **don't put too much money** in it
-* Eclair's JSON API should **NOT** be accessible from the outside world (similarly to Bitcoin Core API)
-
+  * [Lightning Network Specification Compliance](#lightning-network-specification-compliance)
+  * [JSON API](#json-api)
+  * [Documentation](#documentation)
+  * [Installation](#installation)
+    * [Prerequisite: Bitcoin Core](#prerequisite-bitcoin-core)
+    * [Installing Eclair](#installing-eclair)
+  * [Configuration](#configuration)
+    * [Configuration file](#configuration-file)
+    * [Configure Bitcoin Core wallet](#configure-bitcoin-core-wallet)
+    * [Java Environment Variables](#java-environment-variables)
+    * [Logging](#logging)
+    * [Backup](#backup)
+  * [Docker](#docker)
+  * [Plugins](#plugins)
+  * [Testnet usage](#testnet-usage)
+  * [Resources](#resources)
 ---
 
 ## Lightning Network Specification Compliance
@@ -30,6 +38,8 @@ Eclair offers a feature-rich HTTP API that enables application developers to eas
 
 For more information please visit the [API documentation website](https://acinq.github.io/eclair).
 
+:rotating_light: Eclair's JSON API should **NOT** be accessible from the outside world (similarly to Bitcoin Core API)
+
 ## Documentation
 
 Please visit our [docs](./docs) and [wiki](https://github.com/acinq/eclair/wiki) to find detailed instructions on how to configure your
@@ -39,7 +49,7 @@ You will find detailed guides and frequently asked questions there.
 
 ## Installation
 
-### Configuring Bitcoin Core
+### Prerequisite: Bitcoin Core
 
 :warning: Eclair requires Bitcoin Core 0.20.1 or 0.21.1. If you are upgrading an existing wallet, you may need to create a new address and send all your funds to that address.
 
@@ -73,9 +83,9 @@ eclair-node-<version>-<commit_id>/bin/eclair-node.sh
 
 You can then control your node via the [eclair-cli](https://github.com/ACINQ/eclair/wiki/Usage) or the [API](https://github.com/ACINQ/eclair/wiki/API).
 
-### Configuring Eclair
+## Configuration
 
-#### Configuration file
+### Configuration file
 
 Eclair reads its configuration file, and write its logs, to `~/.eclair` by default.
 
@@ -105,7 +115,7 @@ Quotes are not required unless the value contains special characters. Full synta
 
 &rarr; see [here](./docs/Configure.md) for more configuration options.
 
-#### Configure Bitcoin Core wallet
+### Configure Bitcoin Core wallet
 
 Eclair will use the default loaded Bitcoin Core wallet to fund any channels you choose to open.
 If you want to use a different wallet from the default one, you must set `eclair.bitcoind.wallet` accordingly in your `eclair.conf`.
@@ -115,7 +125,7 @@ If you want to use a different wallet from the default one, you must set `eclair
 Eclair will return BTC from closed channels to the wallet configured.
 Any BTC found in the wallet can be used to fund the channels you choose to open.
 
-#### Java Environment Variables
+### Java Environment Variables
 
 Some advanced parameters can be changed with java environment variables. Most users won't need this and can skip this section.
 
@@ -132,15 +142,15 @@ For example, to specify a different data directory you would run the following c
 eclair-node-<version>-<commit_id>/bin/eclair-node.sh -Declair.datadir=/tmp/node1
 ```
 
-#### Logging
+### Logging
 
 Eclair uses [`logback`](https://logback.qos.ch) for logging. To use a different configuration, and override the internal logback.xml, run:
 
 ```shell
 eclair-node-<version>-<commit_id>/bin/eclair-node.sh -Dlogback.configurationFile=/path/to/logback-custom.xml
 ```
 
-#### Backup
+### Backup
 
 The files that you need to backup are located in your data directory. You must backup:
 
@@ -154,7 +164,7 @@ always consistent and safe to use even when Eclair is running, and this is what
 For example, you could configure a `cron` task for your backup job. Or you could configure an optional notification script to be called by eclair once a new database snapshot has been created, using the following option:
 
 ```conf
-eclair.backup-notify-script = "/absolute/path/to/script.sh"
+eclair.file-backup.notify-script = "/absolute/path/to/script.sh"
 ```
 
 Make sure your script is executable and uses an absolute path name for `eclair.sqlite.bak`.