fix(portal|website): Fix static paths for website and elixir (#3802)

Phoenix VerifiedRoutes expects directories for `statics` where we were
passing filenames too.

These are removed since they're not required -- all of the top level
files we need to serve at the root don't need VerifiedRoutes.

For the website, the files were named incorrectly.


The above issues were causing 404s on both the website and portal.

elixir/apps/api/lib/api.ex

@@ -1,5 +1,5 @@
 defmodule API do
-  def static_paths, do: ~w(assets fonts images favicon.ico site.webmanifest robots.txt)
+  def static_paths, do: ~w(assets fonts images)
 
   def router do
     quote do

elixir/apps/web/lib/web.ex

@@ -18,7 +18,7 @@ defmodule Web do
   """
 
   def static_paths,
-    do: ~w(assets fonts images .well-known favicon.ico site.webmanifest robots.txt)
+    do: ~w(assets fonts images .well-known)
 
   def router do
     quote do

elixir/apps/web/lib/web/components/layouts/root.html.heex

@@ -4,10 +4,10 @@
     <meta charset="utf-8" />
     <meta http-equiv="X-UA-Compatible" content="IE=edge" />
     <meta name="viewport" content="width=client-width, initial-scale=1" />
-    <link rel="icon" href={~p"/favicon.ico"} sizes="any" />
+    <link rel="icon" href="/favicon.ico" sizes="any" />
     <link rel="icon" href={~p"/images/favicon.svg"} type="image/svg+xml" />
     <link rel="apple-touch-icon" href={~p"/images/apple-touch-icon.png"} />
-    <link rel="manifest" href={~p"/site.webmanifest"} />
+    <link rel="manifest" href="/site.webmanifest" />
     <meta name="theme-color" content="#331700" />
     <meta name="csrf-token" content={get_csrf_token()} />
     <.live_title suffix=" · Firezone">

website/src/app/manifest.webmanifest

@@ -3,12 +3,12 @@
     "short_name": "Firezone",
     "icons": [
         {
-            "src": "/android-chrome-192x192.png",
+            "src": "/images/android-chrome-192x192.png",
             "sizes": "192x192",
             "type": "image/png"
         },
         {
-            "src": "/android-chrome-512x512.png",
+            "src": "/images/android-chrome-512x512.png",
             "sizes": "512x512",
             "type": "image/png"
         }