Added sockets exercise

sockets/go.mod

@@ -0,0 +1,3 @@
+module sockets
+
+go 1.22.1

sockets/main.go

@@ -0,0 +1,34 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"net"
+	"strings"
+)
+
+func main() {
+	ln, err := net.Listen("tcp", ":1302")
+	catchErr(err)
+	fmt.Println("Listening on port 1302")
+
+	conn, err := ln.Accept()
+	catchErr(err)
+
+	for {
+		message, err := bufio.NewReader(conn).ReadString('\n')
+		catchErr(err)
+		fmt.Printf("Message received: %v", string(message))
+		newMsg := strings.ToUpper(message)
+		conn.Write([]byte(newMsg + "\n"))
+	}
+}
+
+func catchErr(err error) (errHappened bool) {
+	errHappened = false
+	if err != nil {
+		errHappened = true
+		fmt.Println(err)
+	}
+	return errHappened
+}