{{ define "header" }}
<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="utf-8">
		<meta http-equiv="X-UA-Compatible" content="IE=edge">
		<meta name="viewport" content="width=device-width, initial-scale=1">
		<title>{{ capitalize .Name }} ~ Lindenmayer</title>
		<link rel="stylesheet" href="/static/css/style.css">
	</head>
	<body>
		<div class="wrapper">
			<header>
				<h1><a href="/">Lindenmayer</a></h1>
			</header>
{{ end }}

{{ define "header" }}
<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="utf-8">
		<meta http-equiv="X-UA-Compatible" content="IE=edge">
		<meta name="viewport" content="width=device-width, initial-scale=1">
		<title>{{ if .Name }}{{ capitalize .Name }} ~ {{ end }}Lindenmayer</title>
		<link rel="stylesheet" href="/static/css/style.css">
	</head>
	<body>
		<div class="wrapper">
			<header>
				<h1><a href="/">Lindenmayer</a></h1>
			</header>
{{ end }}

Add check in 404 template so that it doesn't 500
Add check in 404 template so that it doesn't 500

(Due to .Name not being present)
