feat: modularize the code.

delete.go

@@ -0,0 +1,22 @@
+package main
+
+import (
+	"github.com/labstack/echo/v4"
+	"net/http"
+	"os"
+)
+
+func Delete(c echo.Context) error {
+	file := c.Param("file")
+	filePath := "files/" + file
+
+	if _, err := os.Stat(filePath); err != nil {
+		return c.String(http.StatusOK, "That file doesn't exist on the server\n")
+	}
+
+	err := os.Remove(filePath)
+	if err != nil {
+		return c.String(http.StatusOK, "Error while deleting "+file+"\n")
+	}
+	return c.String(http.StatusOK, "Deleted file from server: "+file+"\n")
+}