fixup! Refactor config and get rid of some dependencies

README.md

@@ -1,41 +1,34 @@
-# IPsec Prometheus Exporter
+# IPSec Prometheus Exporter
 
-_The IPsec Prometheus exporter subscribes to the strongSwan via Vici API and exposes [Security Associations](https://github.com/strongswan/strongswan/blob/master/src/libcharon/plugins/vici/README.md#list-sa) (SAs) metrics._
+_The IPSec Prometheus exporter subscribes to the strongSwan via Vici API and exposes [Security Associations](https://github.com/strongswan/strongswan/blob/master/src/libcharon/plugins/vici/README.md#list-sa) (SAs) metrics._
 
 Collected metrics (together with application metrics) are exposed on `/metrics` endpoint. Prometheus target is then configured with this endpoint and port e.g. `http://localhost:8079/metrics`.
 
 ## Configuration
 
-IPsec Prometheus exporter is configured via command-line arguments. If not provided, the default values are used.
+IPSec Prometheus exporter is configured via command-line arguments. If not provided, the default values are used.
 
 ### Command-line arguments
 
 If the default value match with your choice you can omit it.
 
 ```
-# server port where the collected metrics are available
---server-port=8079
-
-# logging level
---log-level=INFO
-
-# Vici network scheme - tcp, udp or unix
---vici-network=tcp
-
-# Vici address is the ip-address or hostname with port or unix socket path.
-# IPv6 is supported. Use address in format of "[fd12:3456:789a::1]:4502".
---vici-address=localhost:4502
+Options and default values:
+--server-port=8079              Application port where the collected metrics are available
+--log-level=info                Logging level (debug, info, warn, error)
+--vici-network=tcp              Vici network scheme (tcp, udp, unix)
+--vici-address=localhost:4502   IP address or hostname with a port or unix socket path
+                                IPv6 is supported. Use address in format of "[fd12:3456:789a::1]:4502"
 ```
 
 ## Value Definition
 
-
-| Metric | Value | Description |
-|--------|-------|-------------|
-| strongswan_*_status | 0 | The tunnel is installed and is up and running. |
-| strongswan_*_status | 1 | The connection is established. |
-| strongswan_*_status | 2 | The tunnel or connection is down. |
-| strongswan_*_status | 3 | The tunnel or connection status is not recognized. |
+| Metric              | Value | Description                                        |
+|---------------------|-------|----------------------------------------------------|
+| strongswan_*_status | 0     | The tunnel is installed and is up and running.     |
+| strongswan_*_status | 1     | The connection is established.                     |
+| strongswan_*_status | 2     | The tunnel or connection is down.                  |
+| strongswan_*_status | 3     | The tunnel or connection status is not recognized. |
 
 ## Build & Run
 To build the binary run:
@@ -45,7 +38,7 @@ make build
 
 Run the binary with optional arguments provided:
 ```bash
-./ipsec-prometheus-exporter [--server-port=8079] [--log-level=INFO] [--vici-network=tcp] [--vici-address=localhost:4502]
+./ipsec-prometheus-exporter [--server-port=8079] [--log-level=info] [--vici-network=tcp] [--vici-address=localhost:4502]
 ```
 
 ## Docker image