initial server implementation

pkg/config/config.go

@@ -0,0 +1,35 @@
+package config
+
+import (
+	"fmt"
+
+	"github.com/spf13/viper"
+)
+
+type Config struct {
+	DBDriver      string `mapstructure:"db_driver"`
+	DBConnString  string `mapstructure:"db_conn_string"`
+	JWTSecret     string `mapstructure:"jwt_secret"`
+	SessionSecret string `mapstructure:"session_secret"`
+	ServerPort    int    `mapstructure:"server_port"`
+}
+
+func Load(path string) (*Config, error) {
+	v := viper.New()
+	v.SetConfigFile(path)
+
+	v.SetDefault("db_driver", "sqlite")
+	v.SetDefault("db_conn_string", "file::memory:?cache=shared")
+	v.SetDefault("server_port", 8080)
+
+	if err := v.ReadInConfig(); err != nil {
+		return nil, fmt.Errorf("read config: %w", err)
+	}
+
+	var cfg Config
+	if err := v.Unmarshal(&cfg); err != nil {
+		return nil, fmt.Errorf("unmarshal config: %w", err)
+	}
+
+	return &cfg, nil
+}