add instructions for the lazy simplest setup.

cmd/trustedcoin/README.md

@@ -1,10 +1,10 @@
 ## The `trustedcoin` plugin.
 
-A plugin that uses block explorers (blockstream.info, mempool.space, blockchain.com and blockchain.info) as backends instead of your own Bitcoin node.
+A plugin that uses block explorers (blockstream.info, mempool.space, blockchair.com and blockchain.info) as backends instead of your own Bitcoin node.
 
 This isn't what you should be doing, but sometimes you may need it.
 
-(Remember this will download all blocks c-lightning needs from blockchain.info in raw, hex format.)
+(Remember this will download all blocks c-lightning needs from blockchain.info or blockchair.com in raw, hex format.)
 
 ## How to install
 
@@ -16,6 +16,20 @@ You only need the binary you can get in [the releases page](https://github.com/f
 
 Also call `chmod -x bcli` so the `bcli` plugin that comes installed by default doesn't conflict with `trustedcoin`.
 
+## How to bootstrap a Lightning node from scratch, without Bitcoin Core, on Ubuntu amd64
+
+```
+add-apt-repository ppa:lightningnetwork/ppa
+apt update
+apt install lightningd
+cd /usr/libexec/c-lightning/plugins
+chmod -x bcli
+wget https://github.com/fiatjaf/lightningd-gjson-rpc/releases/download/trustedcoin-v0.2/trustedcoin_linux_amd64
+chmod +x trustedcoin_linux_amd64
+cd
+lightningd
+```
+
 ## How to use
 
 You don't have to do anything, this will just work.