docs: 📝 Improved diagram and description

README.md

@@ -4,39 +4,37 @@ A lightweight monero payment gateway that can be embedded into any website.  "pa
 
 ## Project overview
 
-There are three components to pago, shown in the big square in this diagram: 
+There are three components to pago, shown in the big square at the bottom in this diagram: 
 
 ```
-        monero           
-        network          
-           ▲             
-           │             
-       ┌───▼───┐         
-       │monerod│         
-       │(remote│         
-       │ node) │         
-       └─────▲─┘         
-    daemonRPC│           
-       ┌─────▼───┐       
-       │View-only│       
-       │ Wallet  │       
-       └─▲─────▲─┘       
-walletRPC│     │walletRPC
-+--------│-----│-------+ 
-|┌───────▼─┐ ┌─▼──────┐| 
-|│Processor│ │Merchant│| 
-|│   API   │ │Frontend│| 
-|└──▲──────┘ └────────┘| 
-|   │HTTPS/WSS         | 
-| ┌─▼──────┐           | 
-| │Payment │           | 
-| │Frontend│           | 
-| └────────┘       pago| 
-+----------------------+ 
+   monero network
+          ▲
+          │
+    ┌─────▼───────┐
+    │   monerod   │
+    │(remote node)│
+    └───────▲─────┘
+   daemonRPC│
+  ┌─────────▼──────┐
+  │view-only wallet│
+  └──────▲────▲────┘
+walletRPC│    │walletRPC
++--------│----│--------+
+|┌───────▼─┐ ┌▼───────┐|
+|│Processor│ │Merchant│|
+|│   API   │ │frontend│|
+|└──▲──────┘ └────────┘|
+|   │HTTPS/WSS         |
+| ┌─▼──────────────┐   |
+| │Payment frontend│   |
+| └────────────────┘   |
++-----------------pago-+
 ```
 
  - The **Processor API** which creates payments using authenticated RPC calls to a viewonly monero wallet
  - The **Payment frontend**, an embeddable html/js/css interface for making payments, which communicates with the processor API with HTTPS and WSS (websockets)
  - The **Merchant frontend**, an embeddable html/js/css interface for checking payment status, which makes authenticated RPC calls to the wallet directly
 
-The processor api is a node.js server and the two frontends are clientside javascript with a single lightweight dependency: the knockoutJS microframework.  
+The processor api is an express/node.js server and the two frontends have a single lightweight dependency: the knockoutJS microframework.  
+
+There is no database.  Data are stored in the wallet file, which should be backed up like any data.