New error page, add legal pages, responsiveness for home page

pages/about.vue

@@ -0,0 +1,34 @@
+<template>
+  <div class="main">
+    <h1>About</h1>
+    <p>
+      Founded in 2020, Modrinth was created to provide modders with an open and
+      intuitive platform to publish their mods on.
+    </p>
+
+    <p>
+      Our primary goal is to be as open as possible, with all our code being
+      Open Source, while giving back to the modding community as much as
+      possible.
+    </p>
+
+    <p>
+      While we still are in early alpha, we hope we can soon be a major modding
+      platform for all modders :)
+    </p>
+  </div>
+</template>
+
+<script>
+export default {
+  auth: false,
+  layout: 'home',
+}
+</script>
+
+<style lang="scss" scoped>
+.main {
+  margin: 0 auto;
+  max-width: 800px;
+}
+</style>