fix argument name for kafka topic

Cargo.toml

@@ -4,7 +4,7 @@ version = "0.0.1-SNAPSHOT"
 authors = ["Sebastian Schüpbach <sebastian.schuepbach@unibas.ch>"]
 edition = "2018"
 description = "k8s metrics client"
-documentation = "https://sschuepbach.pages.switch.ch/metrics-client/metrics-client"
+documentation = "https://sschuepbach.pages.switch.ch/metrics-client/metrics_client"
 readme = "README.md"
 homepage = "https://gitlab.switch.ch/sschuepbach/metrics-client"
 repository = "https://gitlab.switch.ch/sschuepbach/metrics-client"

README.md

@@ -12,3 +12,7 @@ Settings are defined via environmental variables:
 * `RETENTION_TIME_MIN`: 
 * `TOPIC_NAME`
 * `UPDATE_INTERVAL_MIN`: 
+
+## API Documentation
+
+https://sschuepbach.pages.switch.ch/metrics-client/metrics_client

src/main.rs

@@ -28,7 +28,7 @@ fn parse_config() -> ArgMatches<'static> {
         )
         .arg(
             Arg::with_name("topic")
-                .short("k")
+                .short("t")
                 .long("topic")
                 .value_name("NAME")
                 .help("Sets Kafka topic name")