[Bug] Envoy proxy container failing

**Description**
Proxy container(Envoy) container exits due to an issue with configuration

**Expected Behavior**
Should run the TCP metrics succesfully

**Error**
```bash
proxy_1 | [2022-01-03 16:20:08.763][8][info][main] [external/envoy/source/server/server.cc:372] envoy.request_id: envoy.request_id.uuid
proxy_1 | [2022-01-03 16:20:08.766][8][critical][main] [external/envoy/source/server/server.cc:114] error initializing configuration '/etc/envoy.yaml': Protobuf message (type envoy.config.bootstrap.v3.Bootstrap reason INVALID_ARGUMENT:(static_resources.clusters[0]) hosts: Cannot find field.) has unknown fields
proxy_1 | [2022-01-03 16:20:08.766][8][info][main] [external/envoy/source/server/server.cc:891] exiting
proxy_1 | [2022-01-03 16:20:08.766][8][debug][main] [external/envoy/source/common/access_log/access_log_manager_impl.cc:21] destroyed access loggers
proxy_1 | [2022-01-03 16:20:08.766][8][debug][main] [external/envoy/source/common/event/dispatcher_impl.cc:82] destroying dispatcher main_thread
proxy_1 | [2022-01-03 16:20:08.766][8][debug][init] [external/envoy/source/common/init/watcher_impl.cc:31] init manager Server destroyed
proxy_1 | Protobuf message (type envoy.config.bootstrap.v3.Bootstrap reason INVALID_ARGUMENT:(static_resources.clusters[0]) hosts: Cannot find field.) has unknown fields
tcp-metrics_proxy_1 exited with code 1
```
**Environment:**
- OS: Ubuntu
- Version: 21.10
- Device: Laptop

**To Reproduce**
Follow the steps for [TCPmetrics](https://github.com/layer5io/wasm-filters#tcp-metrics) to reproduce this error,
However I've used ``` make run ``` to see docker logs