Set domain to be nil by default

config/config.yml

@@ -10,4 +10,4 @@ db:
   dbname: invidious
 full_refresh: false
 https_only: false
-domain: invidio.us
+domain:

src/invidious.cr

@@ -1056,7 +1056,7 @@ post "/login" do |env|
         end
 
         if config.domain
-          env.response.cookies["SID"] = HTTP::Cookie.new(name: "SID", domain: ".#{config.domain}", value: sid, expires: Time.now + 2.years,
+          env.response.cookies["SID"] = HTTP::Cookie.new(name: "SID", domain: "#{config.domain}", value: sid, expires: Time.now + 2.years,
             secure: secure, http_only: true)
         else
           env.response.cookies["SID"] = HTTP::Cookie.new(name: "SID", value: sid, expires: Time.now + 2.years,
@@ -1118,7 +1118,7 @@ post "/login" do |env|
       end
 
       if config.domain
-        env.response.cookies["SID"] = HTTP::Cookie.new(name: "SID", domain: ".#{config.domain}", value: sid, expires: Time.now + 2.years,
+        env.response.cookies["SID"] = HTTP::Cookie.new(name: "SID", domain: "#{config.domain}", value: sid, expires: Time.now + 2.years,
           secure: secure, http_only: true)
       else
         env.response.cookies["SID"] = HTTP::Cookie.new(name: "SID", value: sid, expires: Time.now + 2.years,

src/invidious/helpers/utils.cr

@@ -200,7 +200,12 @@ def make_host_url(ssl, host)
     scheme = "http://"
   end
 
+  if host
+    host = host.lchop(".")
     return "#{scheme}#{host}"
+  else
+    return ""
+  end
 end
 
 def get_referer(env, fallback = "/")