The [README](https://github.com/balancer-labs/balancer-subgraph-v2/blob/master/README.md) file is outdated. It was lastly updated in the following commit: https://github.com/balancer-labs/balancer-subgraph-v2/commit/0283d2b84324c7858da9edc03ceaec9a036c716f Since then, the docker setup has been moved to a different repository: https://github.com/balancer-labs/balancer-subgraph-v2/pull/29