Fixed lint issues and missing documentation

internal/config/load.go

@@ -9,7 +9,8 @@ import (
 	"github.com/spf13/viper"
 )
 
-// Reads in dotenv file for configuration
+// loadEnv loads environment variables from a .env file in the working
+// directory.
 func loadEnv() error {
 	if err := godotenv.Load(); err != nil {
 		return fmt.Errorf("invalid .env file: %w", err)
@@ -17,7 +18,9 @@ func loadEnv() error {
 	return nil
 }
 
-// Reads in config file and ENV variables if set to form a configuration.
+// loadConfig sets up Viper with the defaults, cfgFile (or config.* found in
+// EtcConfigPath or the working directory) and JOBSEARCH_* environment
+// variables. A missing config file is only a warning.
 func loadConfig(cfgFile string) error {
 	if cfgFile != "" {
 		// Use config file from the flag.
@@ -54,7 +57,9 @@ func loadConfig(cfgFile string) error {
 	return nil
 }
 
-// Initilises environment file configuration and general app configuration
+// Init loads the .env file and the configuration (see loadConfig) into conf.
+// A debug or error log level already set in conf, from --debug or --quiet,
+// is kept over the loaded one.
 func Init(cfgFile string, conf *JobSearchConfig) error {
 	if err := loadEnv(); err != nil {
 		return err