Add a fixturenet-payments stack (#540)

* Add a fixturenet-payments stack

* Export the WebSocket port in fixturenet-eth-geth service

* Add container to run a go-nitro node

* Add container to deploy Nitro contracts

* Read contract addresses from a volume when running the Nitro node

* Add a service for Nitro reverse payment proxy

* Expose payment proxy endpoint to be accessible from host

* Map nitro node messaging and payment proxy ports to host

* Use container to deploy Nitro contracts in mobymask-v3 stack

* Use a common contract deployment script from mobymask-v3 stack

* Add MobyMask contract deployment and watcher services

* Fixes for contract deployment and watcher scripts

* Add a container and service for mobymask-snap

* Add MobyMask app service

* Add container and service for a ponder app

* Fix ponder setup and update instructions

* Handle review comments

* Use enablepaidrpcmethods flag in reverse payment proxy server

* Update go-nitro branch

* Fixes for mobymask-v3 stack

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Co-authored-by: Nabarun <nabarun@deepstacksoft.com>

app/data/container-image-list.txt

@@ -51,3 +51,7 @@ cerc/graph-node
 cerc/sushiswap-subgraphs
 cerc/webapp-base
 cerc/watcher-mobymask-v3
+cerc/go-nitro
+cerc/nitro-contracts
+cerc/mobymask-snap
+cerc/ponder