Adds comments / clarifies L1 as ethereum, not Base (#19)

* Adds comments / clarifies L1 as ethereum, not Base

* Fix casing

---------

Co-authored-by: Michael de Hoog <michael.dehoog@coinbase.com>

Author: Karmastic

README.md

@@ -34,8 +34,8 @@ We recommend you this configuration to run a node:
 
 ### Troubleshooting
 
-If you encounter problems with your node, please open a [GitHub issue](https://github.com/base-org/node/issues/new/choose) or reach out on our Discord:
-- Once you've joined, in the Discord app go to `server menu` > `Linked Roles` > `connect GitHub` and connect your GitHub account so you can gain access to our special developer channels
+If you encounter problems with your node, please open a [GitHub issue](https://github.com/base-org/node/issues/new/choose) or reach out on our [Discord](https://discord.gg/buildonbase):
+- Once you've joined, in the Discord app go to `server menu` > `Linked Roles` > `connect GitHub` and connect your GitHub account so you can gain access to our developer channels
 - Report your issue in `#🛟|node-support`
 
 ### Supported networks
@@ -47,7 +47,7 @@ If you encounter problems with your node, please open a [GitHub issue](https://g
 
 ### Usage
 
-1. Ensure you have an Goerli L1 node RPC available, and set `OP_NODE_L1_ETH_RPC` (in `docker-compose.yml` if using docker-compose).
+1. Ensure you have an Ethereum Goerli L1 node RPC available (not Base Goerli), and set `OP_NODE_L1_ETH_RPC` (in `docker-compose.yml` if using docker-compose). If running your own L1 node, it needs to be synced before Base will be able to fully sync.
 2. Run:
 ```
 docker compose up

docker-compose.yml

@@ -1,5 +1,5 @@
 services:
-  geth:
+  geth: # this is Optimism's geth client
     build: .
     ports:
       - 8545:8545
@@ -19,12 +19,12 @@ services:
     ports:
       - 7545:8545
       - 9222:9222
-      - 7300:7300
+      - 7300:7300 # metrics
       - 6060:6060
     command:
       - ./op-node-entrypoint.sh
     environment:
-      - OP_NODE_L1_ETH_RPC=https://ethereum-goerli-rpc.allthatnode.com # replace with your L1 node RPC URL
+      - OP_NODE_L1_ETH_RPC=https://ethereum-goerli-rpc.allthatnode.com # [recommended] replace with your preferred L1 (ethereum, not Base) node RPC URL
       - OP_NODE_L2_ENGINE_AUTH=/tmp/engine-auth-jwt
       - OP_NODE_L2_ENGINE_AUTH_RAW=688f5d737bad920bdfb2fc2f488d6b6209eebda1dae949a8de91398d932c517a # for localdev only
       - OP_NODE_L2_ENGINE_RPC=http://geth:8551