First, you need to install the required packages. Run the following commands in your terminal:

```bash
go get -u github.com/labstack/echo/v4
go get -u github.com/mattn/go-sqlite3
```

Now create a file named `main.go` and add the following code:

```go
package main

import (
	"database/sql"
	"fmt"
	"net/http"
	"time"

	"github.com/labstack/echo/v4"
	_ "github.com/mattn/go-sqlite3"
)

type Note struct {
	ID        int       `json:"id"`
	Title     string    `json:"title"`
	Content   string    `json:"content"`
	Timestamp time.Time `json:"timestamp"`
}

func initDB(filepath string) *sql.DB {
	db, err := sql.Open("sqlite3", filepath)
	if err != nil {
		panic(err)
	}
	if db == nil {
		panic("db is nil")
	}
	return db
}

func migrate(db *sql.DB) {
	sql := `
	CREATE TABLE IF NOT EXISTS notes(
		id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
		title TEXT NOT NULL,
		content TEXT NOT NULL,
		timestamp DATETIME DEFAULT CURRENT_TIMESTAMP
	);
	`
	_, err := db.Exec(sql)
	if err != nil {
		panic(err)
	}
}

func main() {
	e := echo.New()

	db := initDB("notes.db")
	migrate(db)

	e.POST("/notes", func(c echo.Context) error {
		note := new(Note)
		if err := c.Bind(note); err != nil {
			return err
		}

		stmt, err := db.Prepare("INSERT INTO notes(title, content) values(?, ?)")
		if err != nil {
			return err
		}

		res, err := stmt.Exec(note.Title, note.Content)
		if err != nil {
			return err
		}

		id, err := res.LastInsertId()
		if err != nil {
			return err
		}
		note.ID = int(id)

		return c.JSON(http.StatusCreated, note)
	})

	e.GET("/notes/:id", func(c echo.Context) error {
		id := c.Param("id")
		row := db.QueryRow("SELECT id, title, content, timestamp FROM notes WHERE id=?", id)

		note := new(Note)
		err := row.Scan(&note.ID, &note.Title, &note.Content, &note.Timestamp)
		if err == sql.ErrNoRows {
			return echo.NewHTTPError(http.StatusNotFound, "Note not found")
		} else if err != nil {
			return err
		}

		return c.JSON(http.StatusOK, note)
	})

	e.PUT("/notes/:id", func(c echo.Context) error {
		id := c.Param("id")

		note := new(Note)
		if err := c.Bind(note); err != nil {
			return err
		}

		stmt, err := db.Prepare("UPDATE notes SET title=?, content=? WHERE id=?")
		if err != nil {
			return err
		}

		res, err := stmt.Exec(note.Title, note.Content, id)
		if err != nil {
			return err
		}

		rowsAffected, err := res.RowsAffected()
		if err != nil {
			return err
		}
		if rowsAffected == 0 {
			return echo.NewHTTPError(http.StatusNotFound, "Note not found")
		}

		return c.NoContent(http.StatusOK)
	})

	e.DELETE("/notes/:id", func(c echo.Context) error {
		id := c.Param("id")

		stmt, err := db.Prepare("DELETE FROM notes WHERE id=?")
		if err != nil {
			return err
		}

		res, err := stmt.Exec(id)
		if err != nil {
			return err
		}

		rowsAffected, err := res.RowsAffected()
		if err != nil {
			return err
		}
		if rowsAffected == 0 {
			return echo.NewHTTPError(http.StatusNotFound, "Note not found")
		}

		return c.NoContent(http.StatusOK)
	})

	e.Logger.Fatal(e.Start(":8080"))
}
```

This code creates a simple web server using the Echo framework and SQLite database. The server has endpoints for creating, reading, updating, and deleting notes with a title, content, and timestamp.

To run the server, execute `go run main.go` in your terminal. You can then use an API client like Postman or curl to test the different endpoints:

- POST /notes: Create a new note
- GET /notes/:id: Get a note by ID
- PUT /notes/:id: Update a note by ID
- DELETE /notes/:id: Delete a note by ID
먼저 필요한 패키지를 설치해야 합니다. 터미널에서 다음 명령을 실행합니다:

```bash
go get -u github.com/labstack/echo/v4
go get -u github.com/mattn/go-sqlite3
```

이제 `main.go`라는 파일을 만들고 다음 코드를 추가합니다:

```go
package main

import (
	"database/sql"
	"fmt"
	"net/http"
	"time"

	"github.com/labstack/echo/v4"
	_ "github.com/mattn/go-sqlite3"
)

type Note struct {
	ID        int       `json:"id"`
	Title     string    `json:"title"`
	Content   string    `json:"content"`
	Timestamp time.Time `json:"timestamp"`
}

func initDB(filepath string) *sql.DB {
	db, err := sql.Open("sqlite3", filepath)
	if err != nil {
		panic(err)
	}
	if db == nil {
		panic("db is nil")
	}
	return db
}

func migrate(db *sql.DB) {
	sql := `
	CREATE TABLE IF NOT EXISTS notes(
		id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
		title TEXT NOT NULL,
		content TEXT NOT NULL,
		timestamp DATETIME DEFAULT CURRENT_TIMESTAMP
	);
	`
	_, err := db.Exec(sql)
	if err != nil {
		panic(err)
	}
}

func main() {
	e := echo.New()

	db := initDB("notes.db")
	migrate(db)

	e.POST("/notes", func(c echo.Context) error {
		note := new(Note)
		if err := c.Bind(note); err != nil {
			return err
		}

		stmt, err := db.Prepare("INSERT INTO notes(title, content) values(?, ?)")
		if err != nil {
			return err
		}

		res, err := stmt.Exec(note.Title, note.Content)
		if err != nil {
			return err
		}

		id, err := res.LastInsertId()
		if err != nil {
			return err
		}
		note.ID = int(id)

		return c.JSON(http.StatusCreated, note)
	})

	e.GET("/notes/:id", func(c echo.Context) error {
		id := c.Param("id")
		row := db.QueryRow("SELECT id, title, content, timestamp FROM notes WHERE id=?", id)

		note := new(Note)
		err := row.Scan(&note.ID, &note.Title, &note.Content, &note.Timestamp)
		if err == sql.ErrNoRows {
			return echo.NewHTTPError(http.StatusNotFound, "Note not found")
		} else if err != nil {
			return err
		}

		return c.JSON(http.StatusOK, note)
	})

	e.PUT("/notes/:id", func(c echo.Context) error {
		id := c.Param("id")

		note := new(Note)
		if err := c.Bind(note); err != nil {
			return err
		}

		stmt, err := db.Prepare("UPDATE notes SET title=?, content=? WHERE id=?")
		if err != nil {
			return err
		}

		res, err := stmt.Exec(note.Title, note.Content, id)
		if err != nil {
			return err
		}

		rowsAffected, err := res.RowsAffected()
		if err != nil {
			return err
		}
		if rowsAffected == 0 {
			return echo.NewHTTPError(http.StatusNotFound, "Note not found")
		}

		return c.NoContent(http.StatusOK)
	})

	e.DELETE("/notes/:id", func(c echo.Context) error {
		id := c.Param("id")

		stmt, err := db.Prepare("DELETE FROM notes WHERE id=?")
		if err != nil {
			return err
		}

		res, err := stmt.Exec(id)
		if err != nil {
			return err
		}

		rowsAffected, err := res.RowsAffected()
		if err != nil {
			return err
		}
		if rowsAffected == 0 {
			return echo.NewHTTPError(http.StatusNotFound, "Note not found")
		}

		return c.NoContent(http.StatusOK)
	})

	e.Logger.Fatal(e.Start(":8080"))
}
```

이 코드는 Echo 프레임워크와 SQLite 데이터베이스를 사용해 간단한 웹 서버를 만듭니다. 서버에는 제목, 콘텐츠, 타임스탬프가 있는 노트의 생성, 읽기, 업데이트, 삭제를 위한 엔드포인트가 있습니다.

서버를 실행하려면 터미널에서 `go run main.go`를 실행합니다. 그런 다음 Postman이나 curl과 같은 API 클라이언트를 사용해 다양한 엔드포인트를 테스트할 수 있습니다.

- POST /notes: 새 노트 만들기
- GET /notes/:id: ID로 노트 가져오기
- PUT /notes/:id: ID로 노트 업데이트
- DELETE /notes/:id: ID로 노트 삭제