docs: Improve log output for missing config

README.md

@@ -33,6 +33,10 @@ See [Running](#Running) for details.
 See the `go.mod` file for minimum required Go version.
 There are currently no dependencies apart from the Go standard library.
 
+``` shell
+go build -ldflags '-X main.version=v420.69-rc23' .
+```
+
 ## Running
 
 Set the environment variable to a comma-separated list of config files or pass the `-c` flag.

config/config.go

@@ -14,7 +14,7 @@ import (
 )
 
 const (
-	envConfigPath = "CONFIG_PATH"
+	envConfigPath = "SPACEAPID_CONFIG_PATH"
 )
 
 type pathsT []string
@@ -59,7 +59,7 @@ func getConfigPaths() (paths pathsT) {
 
 	// If paths is still empty we are missing something
 	if len(paths) == 0 {
-		log.Fatalln("Neither the env variable nor cli flag was specified, we are missing a config file.")
+		log.Fatalln("Error: Neither env: ", envConfigPath, "nor cli flag was specified, unable to start without config.")
 	}
 	return
 }
@@ -91,7 +91,7 @@ func ParseConfiguration() (conf SpaceapidConfig) {
 		log.Fatalln("Provided file doesn't specify compatibility with API version 14")
 	}
 
-	// Initialise fields for environment sensors
+	// Initialize fields for environment sensors
 	conf.Response.Sensors = make(map[string][]types.EnvironmentSensor)
 	for key, sensorConfigs := range conf.Dynamic.Sensors {
 		conf.Response.Sensors[key] = make([]types.EnvironmentSensor, len(sensorConfigs))