Merge pull request #1502 from basecamp/remove-next-container-special-case

Rely on semver for version checks

Author: djmb

lib/kamal/cli/proxy.rb

@@ -13,7 +13,7 @@ def boot
 
         version = capture_with_info(*KAMAL.proxy.version).strip.presence
 
-        if version && version != "next" && Kamal::Utils.older_version?(version, Kamal::Configuration::PROXY_MINIMUM_VERSION)
+        if version && Kamal::Utils.older_version?(version, Kamal::Configuration::PROXY_MINIMUM_VERSION)
           raise "kamal-proxy version #{version} is too old, run `kamal proxy reboot` in order to update to at least #{Kamal::Configuration::PROXY_MINIMUM_VERSION}"
         end
         execute *KAMAL.proxy.start_or_run