docs(README): Improving usage and endpoint section

Signed-off-by: Vincent Boutour <[email protected]>

README.md

@@ -47,13 +47,17 @@ You'll find a Kubernetes exemple in the [`infra/`](infra/) folder, using my [`ap
 
 ## Endpoints
 
-- `GET /health`: healthcheck of server, respond [`okStatus (default 204)`](#usage) or `503` during [`graceDuration`](#usage) when SIGTERM is received
-- `GET /ready`: same response than `/health` but it also checks external dependencies availability
+- `GET /health`: healthcheck of server, always respond [`okStatus (default 204)`](#usage)
+- `GET /ready`: checks external dependencies availability and then respond [`okStatus (default 204)`](#usage) or `503` during [`graceDuration`](#usage) when `SIGTERM` is received
 - `GET /version`: value of `VERSION` environment variable
-- `GET /metrics`: Prometheus metrics values
+- `GET /metrics`: Prometheus metrics, on a dedicated port [`prometheusPort (default 9090)`](#usage)
 
 ## Usage
 
+The application can be configured by passing CLI args described below or their equivalent as environment variable. CLI values take precedence over environments variables.
+
+Be careful when using the CLI values, if someone list the processes on the system, they will appear in plain-text. Pass secrets by environment variables: it's less easily visible.
+
 ```bash
 Usage of ketchup:
   -address string

infra/web.yaml

@@ -8,7 +8,7 @@ spec:
   chart:
     spec:
       chart: app
-      version: "0.0.73"
+      version: "0.0.74"
       sourceRef:
         kind: HelmRepository
         name: vibioh