Fixed #48: basic 404 error template

CHANGELOG

@@ -8,6 +8,7 @@ Changelog
 - Import: can now specify search template when querying import sources (#45)
 - Player: better handling of errors when fetching the audio file (#46)
 - Login form: now redirect to previous page after login (#2)
+- 404: a decent 404 template, at least (#48)
 
 
 0.2.4 (2017-12-14)

front/src/components/PageNotFound.vue

+<template>
+  <div class="main pusher">
+    <div class="ui vertical stripe segment">
+      <div class="ui text container">
+        <h1 class="ui huge header">
+          <i class="warning icon"></i>
+          <div class="content">
+            <strike>Whale</strike> Page not found!
+          </div>
+        </h1>
+        <p>We're sorry, the page you asked for does not exists.</p>
+        <p>Requested URL: <a :href="path">{{ path }}</a></p>
+        <router-link class="ui icon button" to="/">
+          Go to home page
+          <i class="right arrow icon"></i>
+        </router-link>
+      </div>
+    </div>
+  </div>
+</template>
+
+<script>
+export default {
+  data: function () {
+    return {
+      path: window.location.href
+    }
+  }
+}
+</script>
+
+<!-- Add "scoped" attribute to limit CSS to this component only -->
+<style scoped>
+</style>

front/src/router/index.js

 import Vue from 'vue'
 import Router from 'vue-router'
+import PageNotFound from '@/components/PageNotFound'
 import Home from '@/components/Home'
 import Login from '@/components/auth/Login'
 import Profile from '@/components/auth/Profile'
@@ -72,7 +73,7 @@ export default new Router({
         },
         { path: 'import/batches/:id', name: 'library.import.batches.detail', component: BatchDetail, props: true }
       ]
-    }
-
+    },
+    { path: '*', component: PageNotFound }
   ]
 })