actually use WithError, change some severity

some fatal logs weren't actually fatal, so drop them down to just error
instead.

src/main.go

@@ -27,7 +27,8 @@ func main() {
 		case jsonMessage := <-stream:
 			allDomains, err := jsonMessage.ArrayOfStrings("data", "leaf_cert", "all_domains")
 			if err != nil {
-				log.WithFields(log.Fields{"error": err}).Fatal("Error decoding json string to find all domains")
+				log.WithError(err).Error("Error decoding json string to find all domains")
+				continue
 			}
 
 			anyGlobMatch := false
@@ -62,7 +63,7 @@ func matchesDomains(domainName string) bool {
 func readDomainsFromFile(filepath string) []glob.Glob {
 	file, err := os.Open(filepath)
 	if err != nil {
-		log.WithFields(log.Fields{"error": err}).Fatal("Failed to open file ", filepath)
+		log.WithError(err).Fatal("Failed to open file ", filepath)
 	}
 	defer file.Close()
 
@@ -72,13 +73,13 @@ func readDomainsFromFile(filepath string) []glob.Glob {
 		// TODO: skip blank and commented lines
 		myGlob, err := glob.Compile(text)
 		if err != nil {
-			log.WithFields(log.Fields{"error": err}).Fatal("Invalid glob ", text)
+			log.WithError(err).Error("Invalid glob ", text)
 		}
 		globs = append(globs, myGlob)
 	}
 
 	if err := scanner.Err(); err != nil {
-		log.WithFields(log.Fields{"error": err}).Fatal("Could not scan through file")
+		log.WithError(err).Fatal("Could not scan through file")
 	}
 
 	return globs

src/notify.go

@@ -23,6 +23,6 @@ func notify(allDomains []string) {
     // Send the message to the recipient
     _, err := app.SendMessage(message, recipient)
     if err != nil {
-        log.WithFields(log.Fields{"error": err}).Fatal("Could not send pushover message")
+        log.WithError(err).Error("Could not send pushover message")
     }
 }