nicer 404 and missing page redirects

suchwow/app.py

@@ -1,7 +1,7 @@
 import json
 from os import makedirs
-from flask import Flask, request, session
-from flask import render_template, flash
+from flask import Flask, request, session, redirect
+from flask import render_template, flash, url_for
 from flask_session import Session
 from suchwow import config
 from suchwow.models import Post, Profile, Comment, Notification, db
@@ -41,7 +41,8 @@ def about():
 
 @app.errorhandler(404)
 def not_found(error):
-    return "nothin there, brah"
+    flash("nothing there, brah")
+    return redirect(url_for("index"))
 
 @app.cli.command("init")
 def init():

suchwow/routes/post.py

@@ -46,7 +46,8 @@ def read(id):
             transfers=transfers
         )
     else:
-        return "no meme there brah"
+        flash("No meme there, brah")
+        return redirect(url_for("index"))
 
 @bp.route("/post/create", methods=["GET", "POST"])
 @login_required