Change layout to more go-style-ish, replace some modules

* Deejay files, split them to achieve go-style project layout
* Replace logrus with log/slog module to reduce dependencies
* Replace gopkg.in/ini.v1 with github.com/wlevene/ini to make sure all modules BSD licensed
* Update linter config && fix tons of linter warnings
* Update .gitignore
* Update README.md

cmd/joyproxy/main.go

@@ -0,0 +1,37 @@
+// Package main represents entry point function of application.
+package main
+
+import (
+	"net/http"
+	"os"
+	"time"
+
+	"joyproxy/internal/joyproxy"
+	"joyproxy/internal/log"
+)
+
+// main application entry point.
+func main() {
+	joyproxy.LoadConf()
+
+	log.Init(joyproxy.Cfg.Loglevel, os.Stderr)
+
+	http.HandleFunc("/joyproxy/", joyproxy.JoyproxyHandler)
+	http.HandleFunc("/joyurl", joyproxy.JoyurlHandler)
+
+	log.Infof("Starting application on port %v\n", joyproxy.Cfg.Port)
+
+	// To prevent slow loris ddos, we have to define custom handler because builtin http.ListenAndServe() have no
+	// timeout and sits here forever.
+	server := &http.Server{
+		Addr:              joyproxy.Cfg.Port,
+		ReadHeaderTimeout: time.Duration(joyproxy.Cfg.Timeout) * time.Second,
+		ReadTimeout:       time.Duration(joyproxy.Cfg.Timeout) * time.Second,
+		WriteTimeout:      time.Duration(joyproxy.Cfg.Timeout) * time.Second,
+		IdleTimeout:       time.Duration(joyproxy.Cfg.Timeout) * time.Second,
+	}
+
+	log.Warn(server.ListenAndServe().Error())
+}
+
+/* vim: set ft=go noet ai ts=4 sw=4 sts=4: */