feat: add proxy layer option for requests

Fixes #56 #21

main.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"net"
 	"net/http"
+	"net/url"
 	"os"
 	"strconv"
 	"time"
@@ -21,6 +22,16 @@ func main() {
 		ReadTimeout:  25 * time.Second,
 	}
 
+	PROXY_ENV := os.Getenv("PROXY")
+	if PROXY_ENV != "" {
+		if _, err := url.ParseRequestURI(PROXY_ENV); err != nil {
+			logger.Error("invalid proxy")
+			os.Exit(1)
+		}
+
+		logger.Info("using a custom proxy for requests")
+	}
+
 	port, _ := strconv.Atoi(os.Getenv("PORT"))
 
 	if port == 0 {