Add mempool-config.json to .gitignore, update sample, update README

README.md

@@ -35,6 +35,12 @@ rpcpassword=71b61986da5b03a5694d7c7d5165ece5
 txindex=1
 ```
 
+## mempool config
+Make a copy of the sample config and edit it
+```
+cp mempool-config.sample.json mempool-config.json
+```
+
 Edit mempool-config.json to add your Bitcoin node RPC credentials:
 ```
   "BITCOIN_NODE_HOST": "192.168.1.5",
@@ -67,16 +73,6 @@ Initialize database structure:
 mysql -u mempool -p mempool < mariadb-structure.sql
 ```
 
-Edit mempool-config.json to add your MySQL/MariaDB credentials:
-
-```
-  "DB_HOST": "127.0.0.1",
-  "DB_PORT": 3306,
-  "DB_USER": "mempool",
-  "DB_PASSWORD": "mempool",
-  "DB_DATABASE": "mempool",
-```
-
 ## mempool backend
 
 Create an initial empty cache and start the app: