fix 🐞: Fixed small requested changes

Author: lorenzoronzani

README.md

@@ -100,7 +100,7 @@ To run the gateway in a prod environment with Docker Compose, follow these steps
    This script firstly generated the `telemetry/prometheus/prometheus-prod.yml` config file starting from the `telemetry/prometheus/prometheus-template.yml` (step required to perform the variable substitution) and then simply run the gateway with the following command:
 
     ```
-    docker compose -f docker-compose.yml -f docker-compose-local.yml --env-file .env up -d --build
+    docker compose -f docker-compose.yml -f docker-compose-prod.yml --env-file .env up -d --build
     ```
 
 5. To stop and clean all the local environment a bash script [stop_prod_docker_environment.sh](./scripts/stop_prod_docker_environment.sh) is provided. You can execute it with the command:

scripts/start_local_docker_environment.sh

@@ -6,6 +6,5 @@ dfx start --clean --background
 echo "Removing previous local websocket image"
 docker rmi local/ic-websocket-gateway
 
-# https://docs.docker.com/compose/environment-variables/set-environment-variables/#:~:text=doesnotexist/.env.dev-,You%20can%20use%20multiple,them%20in%20order.%20Later%20files%20can%20override%20variables%20from%20earlier%20files.,-%24%20docker%20compose
 echo "Starting docker environment"
 docker compose -f docker-compose.yml -f docker-compose-local.yml --env-file .env.local up -d --build

scripts/start_prod_docker_environment.sh

@@ -8,7 +8,7 @@ set +a  # Stop automatically exporting
 
 # Run envsubst
 envsubst < ./telemetry/prometheus/prometheus-template.yml > ./telemetry/prometheus/prometheus-prod.yml
+echo "File telemetry/prometheus/prometheus-prod.yml successfully created"
 
-# https://docs.docker.com/compose/environment-variables/set-environment-variables/#:~:text=doesnotexist/.env.dev-,You%20can%20use%20multiple,them%20in%20order.%20Later%20files%20can%20override%20variables%20from%20earlier%20files.,-%24%20docker%20compose
 echo "Starting docker environment"
 docker compose -f docker-compose.yml -f docker-compose-prod.yml --env-file .env up -d

src/ic-websocket-gateway/src/client_session_handler.rs

@@ -112,7 +112,7 @@ impl ClientSessionHandler {
         mut client_channel_tx: Option<Sender<IcWsCanisterMessage>>,
         client_session_span: Span,
     ) -> Result<(), String> {
-        let mut client_start_session_time = Instant::now();
+        let client_start_session_time = Instant::now();
 
         // keeps trying to update the client session state
         // if a new state is returned, execute the corresponding logic
@@ -200,8 +200,6 @@ impl ClientSessionHandler {
                         // Calculate the time it took to open the connection and record it using the timer started in ws_listener.rs
                         let delta = self.start_connection_time.elapsed();
                         histogram!("connection_opening_time", "client_key" => client_key.to_string()).record(delta);
-
-                        client_start_session_time = Instant::now();
                     });
                     // do not return anything as the session is still alive
                 },

src/ic-websocket-gateway/src/gateway_metrics.rs

@@ -19,7 +19,7 @@ pub fn init_metrics(port: Option<u16>) -> Result<(), Box<dyn Error>> {
         .expect("failed to install Prometheus recorder");
 
     describe_gauge!("clients_connected", "The number of clients currently connected");
-    describe_gauge!("active_pollers", "The number of pollers currently connected");
+    describe_gauge!("active_pollers", "The number of pollers currently active");
     describe_histogram!(
         "connection_duration",
         "The duration of the client connection"