docs(l1): add documentation on ethereum metrics exporter use

crates/blockchain/metrics/README.md

@@ -10,7 +10,7 @@ To run the node with metrics, the next steps should be followed:
 4. Run the docker containers, example with the L2:
 
 ```sh
-docker compose -f docker-compose-metrics.yaml -f docker-compose-metrics-l2.override.yaml up
+docker compose -f docker-compose-metrics.yaml -f docker-compose-metrics-l2.overrides.yaml up
 ```
 
 > [!NOTE]

docs/l1/dev-setup-l1.md

@@ -317,3 +317,51 @@ If you want to restart the sync from the very start you can do so by wiping the
 ```bash
 cargo run --bin ethrex -- removedb
 ```
+
+## Ethereum Metrics Exporter
+
+We use the [Ethereum Metrics Exporter](https://github.com/ethpandaops/ethereum-metrics-exporter), a Prometheus metrics exporter for Ethereum execution and consensus nodes, to gather metrics during syncing for L1. The exporter uses the prometheus data source to create a Grafana dashboard and display the metrics. For the syncing to work there must be a consensus node running along with the execution node.
+
+Currently we have two make targets to easily start an execution node and a consensus node on either hoodi or holesky, and display the syncing metrics. In both cases we use a lighthouse consensus node.
+
+### Quickstart guide
+
+Make sure you have your docker daemon running.
+
+- **Code Location**: The targets are defined in `tooling/sync/Makefile`.
+- **How to Run**:
+
+   ```bash
+   # Navigate to tooling/sync directory
+   cd tooling/sync
+
+   # Run target for hoodi 
+   make start-hoodi-metrics-docker
+
+    # Run target for holesky 
+   make start-holesky-metrics-docker
+   ```
+
+To see the dashboards go to [http://localhost:3001](http://localhost:3001). Use “admin” for user and password. Select the Dashboards menu and go to Ethereum Metrics Exporter (Single) to see the exported metrics.
+
+To see the prometheus exported metrics and its respective requests with more detail in case you need to debug go to [http://localhost:9093/metrics](http://localhost:9093/metrics).
+
+### Running the execution node on other networks with metrics enabled
+
+A `docker-compose` is used to bundle prometheus and grafana services, the `*overrides` files define the ports and mounts the prometheus' configuration file.
+If a new dashboard is designed, it can be mounted only in that `*overrides` file.
+A consensus node must be running for the syncing to work.
+
+To run the execution node on any network with metrics, the next steps should be followed:
+1. Build the `ethrex` binary for the network you want (see node options in [CLI Commands](#cli-commands)) with the `metrics` feature enabled.
+2. Enable metrics by using the `--metrics` flag when starting the node.
+3. Set the `--metrics.port` cli arg of the ethrex binary to match the port defined in `crates/blockchain/metrics/provisioning/prometheus/prometheus_l1_sync_docker.yaml`
+4. Run the docker containers:
+
+   ```bash
+   # Navigate to crates/blockchain/metrics directory
+   cd crates/blockchain/metrics
+
+    docker compose -f docker-compose-metrics.yaml -f docker-compose-metrics-l1.overrides.yaml up
+    ```
+For more details on running a sync go to `ethrex/tooling/sync/readme.md`.