Merge pull request #84 from raffis/fix-user-err

fix: don't panic if no user home was found

Author: raffis

README.md

@@ -24,6 +24,12 @@ Get Prometheus MongoDB aggregation query exporter, either as a binaray from the
 For kubernetes users there is an official helm chart for the MongoDB query exporter.
 Please read the installation instructions [here](https://github.com/raffis/mongodb-query-exporter/blob/master/chart/mongodb-query-exporter/README.md).
 
+### Docker
+You can run the exporter using docker (This will start it using the example config provided in the example folder):
+```sh
+docker run -e MDBEXPORTER_CONFIG=/config/configv3.yaml -v $(pwd)/example:/config ghcr.io/raffis/mongodb-query-exporter:latest
+```
+
 ## Usage
 
 ```

cmd/root.go

@@ -152,14 +152,12 @@ func initConfig() {
 	} else {
 		// Find home directory.
 		usr, err := user.Current()
-		if err != nil {
-			panic(err)
+		if err == nil {
+			viper.AddConfigPath(usr.HomeDir + "/.mongodb_query_exporter")
 		}
 
 		// System wide config
 		viper.AddConfigPath("/etc/mongodb_query_exporter")
-		// Search config in home directory with name ".mongodb_query_exporter" (without extension).
-		viper.AddConfigPath(usr.HomeDir + "/.mongodb_query_exporter")
 	}
 
 	viper.SetConfigType("yaml")