chore: update docker compose environment variable syntax (#1719)

Author: 0xpsyduck

docker/docker-compose.yml

@@ -5,7 +5,7 @@ services:
     hostname: trin
     image: portalnetwork/trin:latest
     environment:
-      - RUST_LOG: info
+      - RUST_LOG=info
     command: "--web3-transport http --web3-http-address http://0.0.0.0:8545/"
     network_mode: "host"
     volumes: