Preciso criar uma página com Boostrap

Front-end CSS
#1 
<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8"/>
		<meta name="view-port" content="width=device-width,
		initial-scale=1"/>
		<title>VIRTUAL-IF</title>
		<link rel="stylesheet" href="css/bootstrap.css"/>	
		<link rel="stylesheet" href="css/custom.css"/>
	</head>
	<body>
		<nav class ="navbar navbar-expand-sm">

		</nav>
		<div class="container">
			<div class="row">
				<form class= "col-10 row" >
				<div class= "form-group col-10">
					<label for="name">Usuario</label>
					<input type="text" name="Usuario" class="form-control"/>
				</div>
				<div class= "form-group col-10">
					<label for= "name">Senha</label>
					<input type="text" name="Senha" class="form-control"/>
				</div>
				<div class="form-group col-2">
						<button type="submit" class="btn btn-success botao">ENTRAR</button>
				</div>
				    <div class="form hr-10">
					<div class="cadastro">Esqueci minha Senha</div>
					<div class="form-group hr-10">
					<div class="cadastro">Primeiro acesso para alunos</div>
					<div class="cadastro">Primeiro acesso para responsavel(Pais e Alunos)</div>
				</form>
			</div>
		</div>
	</body>
</html>
#2
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