Adding .gitlab-ci and fixing lifetime stuff

src/signalk.rs

@@ -6,6 +6,7 @@ use serde::Deserialize;
 use serde_json::Value as JValue;
 use std::sync::mpsc::{Sender, Receiver};
 use std::sync::mpsc;
+use chrono::{DateTime, Utc};
 use crate::vesseldata::{VesselDataEvent, VesselDataEventSource};
 
 
@@ -31,7 +32,7 @@ struct Value {
 struct Update {
   #[serde(rename = "$source")]
   dsource: String,
-  timestamp: String,
+  timestamp: DateTime<Utc>,
   values: Vec<Value>,
 }