diff --git a/lib/nulla/uploader.ex b/lib/nulla/uploader.ex
index bb18bf2..a517600 100644
--- a/lib/nulla/uploader.ex
+++ b/lib/nulla/uploader.ex
@@ -5,12 +5,7 @@ defmodule Nulla.Uploader do
   @upload_base "priv/static"
   @upload_prefix "system"
 
-  def upload(
-        %Plug.Upload{path: temp_path, filename: original_name},
-        dir,
-        description,
-        domain
-      ) do
+  def upload(%Plug.Upload{path: temp_path, filename: original_name}, uploadType, name, domain) do
     {:ok, binary} = File.read(temp_path)
     ext = Path.extname(original_name)
     mimetype = MIME.type(ext)
@@ -23,14 +18,54 @@ defmodule Nulla.Uploader do
         true -> "Document"
       end
 
+    {width, height} =
+      cond do
+        mimetype =~ "image" or "video" ->
+          {output, 0} =
+            System.cmd("ffprobe", [
+              "-v",
+              "error",
+              "-select_streams",
+              "v:0",
+              "-show_entries",
+              "stream=width,height",
+              "-of",
+              "default=noprint_wrappers=1",
+              temp_path
+            ])
+
+          parsed_width =
+            Regex.run(~r/width=(\d+)/, output)
+            |> List.last()
+            |> String.to_integer()
+
+          parsed_height =
+            Regex.run(~r/height=(\d+)/, output)
+            |> List.last()
+            |> String.to_integer()
+
+          {parsed_width, parsed_height}
+
+        true ->
+          {nil, nil}
+      end
+
     filename = Base.encode16(:crypto.strong_rand_bytes(8), case: :lower) <> ext
 
     media_attachment_id = Snowflake.next_id()
 
+    dirs =
+      cond do
+        uploadType == :avatar -> "accounts/avatars"
+        uploadType == :header -> "accounts/headers"
+        uploadType == :attachment -> "media_attachments/files"
+        uploadType == :emoji -> "custom_emojis/images"
+      end
+
     relative_path =
       Path.join([
         @upload_prefix,
-        dir,
+        dirs,
         partition_id(media_attachment_id),
         "original",
         filename
@@ -47,9 +82,9 @@ defmodule Nulla.Uploader do
       type: type,
       mediaType: mimetype,
       url: "https://#{domain}/#{relative_path}",
-      name: description,
-      width: 1,
-      height: 1
+      name: name,
+      width: width,
+      height: height
     })
   end
 
diff --git a/lib/nulla_web/components/templates/page/home.html.heex b/lib/nulla_web/components/templates/page/home.html.heex
index e69de29..2d928c6 100644
--- a/lib/nulla_web/components/templates/page/home.html.heex
+++ b/lib/nulla_web/components/templates/page/home.html.heex
@@ -0,0 +1,3 @@
+<main>
+  <.flash_group flash={@flash} />
+</main>
diff --git a/lib/nulla_web/components/templates/page/sign_in.html.heex b/lib/nulla_web/components/templates/page/sign_in.html.heex
index 225a331..33ee7da 100644
--- a/lib/nulla_web/components/templates/page/sign_in.html.heex
+++ b/lib/nulla_web/components/templates/page/sign_in.html.heex
@@ -1,4 +1,6 @@
 <main class="flex min-h-screen items-center justify-center">
+  <.flash_group flash={@flash} />
+
   <form class="flex flex-col gap-2" action="/auth/sign_in" method="post">
     <input type="hidden" name="_csrf_token" value={get_csrf_token()} />
     <label for="email">E-mail address *</label>
diff --git a/lib/nulla_web/components/templates/page/sign_up.html.heex b/lib/nulla_web/components/templates/page/sign_up.html.heex
index 5541d0e..58b7e26 100644
--- a/lib/nulla_web/components/templates/page/sign_up.html.heex
+++ b/lib/nulla_web/components/templates/page/sign_up.html.heex
@@ -1,4 +1,6 @@
 <main class="flex min-h-screen items-center justify-center">
+  <.flash_group flash={@flash} />
+
   <form class="flex flex-col gap-2" action="/auth" method="post">
     <input type="hidden" name="_csrf_token" value={get_csrf_token()} />
     <label for="username">Username *</label>
diff --git a/lib/nulla_web/controllers/auth_controller.ex b/lib/nulla_web/controllers/auth_controller.ex
index 52748e4..e766e56 100644
--- a/lib/nulla_web/controllers/auth_controller.ex
+++ b/lib/nulla_web/controllers/auth_controller.ex
@@ -11,7 +11,7 @@ defmodule NullaWeb.AuthController do
       if Argon2.verify_pass(password, user.password) do
         conn
         |> put_session(:user_id, user.id)
-        |> redirect(to: "/")
+        |> redirect(to: ~p"/")
       else
         conn
         |> put_flash(:error, "Invalid login or password.")
@@ -28,37 +28,39 @@ defmodule NullaWeb.AuthController do
     conn
     |> configure_session(drop: true)
     |> put_flash(:info, "You have been logged out.")
-    |> redirect(to: "/")
+    |> redirect(to: ~p"/")
   end
 
   def sign_up(conn, %{"username" => username, "email" => email, "password" => password}) do
     instance_settings = InstanceSettings.get_instance_settings!()
 
     if not instance_settings.registration do
-      redirect(conn, to: "/")
-    end
-
-    domain = instance_settings.domain
-    hashed_password = Argon2.hash_pwd_salt(password)
-
-    {publicKeyPem, privateKeyPem} = Nulla.KeyGen.gen()
-
-    with {:ok, actor} <- Actor.create_actor_minimal(username, domain, publicKeyPem),
-         {:ok, user} <-
-           User.create_user(%{
-             id: actor.id,
-             email: email,
-             password: hashed_password,
-             privateKeyPem: privateKeyPem,
-             last_active_at: DateTime.utc_now()
-           }) do
       conn
-      |> put_session(:user_id, user.id)
-      |> put_flash(:info, "You're registred!")
-      |> redirect(to: "/")
+      |> put_flash(:error, "Registration is disabled.")
+      |> redirect(to: ~p"/")
     else
-      {:error, %Ecto.Changeset{} = changeset} ->
-        render(conn, "sign_up.html", changeset: changeset)
+      domain = instance_settings.domain
+      hashed_password = Argon2.hash_pwd_salt(password)
+
+      {publicKeyPem, privateKeyPem} = Nulla.KeyGen.gen()
+
+      with {:ok, actor} <- Actor.create_actor_minimal(username, domain, publicKeyPem),
+           {:ok, user} <-
+             User.create_user(%{
+               id: actor.id,
+               email: email,
+               password: hashed_password,
+               privateKeyPem: privateKeyPem,
+               last_active_at: DateTime.utc_now()
+             }) do
+        conn
+        |> put_session(:user_id, user.id)
+        |> put_flash(:info, "You're registred!")
+        |> redirect(to: ~p"/")
+      else
+        {:error, %Ecto.Changeset{} = changeset} ->
+          render(conn, "sign_up.html", changeset: changeset)
+      end
     end
   end
 end