always use trailingSlash, generate 404 page based on error.svelte

Author: frodesundby

src/routes/+error.svelte

@@ -1,11 +1,12 @@
-<img class="centered" src="logo404.png" alt=""/>
+<img class="centered" src="/logo404.png" alt="logo with 404" />
+
 <style>
-    .centered {
-    text-align: center;
-    position: absolute;
-    top: 20%;
-    left: 50%;
-    transform: translate(-50%, -50%);
-    width: 300px;
-}
-</style>
+	.centered {
+		text-align: center;
+		position: absolute;
+		top: 50%;
+		left: 50%;
+		transform: translate(-50%, -50%);
+		width: 300px;
+	}
+</style>

src/routes/+layout.ts

@@ -1 +1,2 @@
 export const prerender = true;
+export const trailingSlash = "always";