allow configuring rpc host

src/context.ts

@@ -2,8 +2,12 @@ import { walletFromEnv } from "./utils"
 
 import { solana, Wallet, Deployer } from "solray"
 
-export const network = (process.env.NETWORK || "local") as any
-export const conn = solana.connect(network)
+export const network: any =
+  process.env.NETWORK || process.env.SOLANA_NETWORK || "local"
+export const rpcHost = process.env.SOLANA_RPC_HOST // optional
+export const conn = solana.connect(network, {
+  rpcHost,
+})
 
 async function openDeployer(): Promise<Deployer> {
   return Deployer.open(`deploy.${network}.json`)