Added network_args to proxy configuration

lib/kamal/commands/proxy.rb

@@ -4,7 +4,7 @@ class Kamal::Commands::Proxy < Kamal::Commands::Base
   def run
     docker :run,
       "--name", container_name,
-      "--network", "kamal",
+      *config.network_args,
       "--detach",
       "--restart", "unless-stopped",
       "--volume", "kamal-proxy-config:/home/kamal-proxy/.config/kamal-proxy",

lib/kamal/configuration/proxy.rb

@@ -3,6 +3,7 @@ class Kamal::Configuration::Proxy
 
   DEFAULT_LOG_REQUEST_HEADERS = [ "Cache-Control", "Last-Modified", "User-Agent" ]
   CONTAINER_NAME = "kamal-proxy"
+  NETWORK = "kamal"
 
   delegate :argumentize, :optionize, to: Kamal::Utils
 
@@ -51,6 +52,10 @@ class Kamal::Configuration::Proxy
     optionize ({ target: "#{target}:#{app_port}" }).merge(deploy_options), with: "="
   end
 
+  def network_args
+    argumentize "--network", network
+  end
+
   def merge(other)
     self.class.new config: config, proxy_config: proxy_config.deep_merge(other.proxy_config)
   end
@@ -59,4 +64,8 @@ class Kamal::Configuration::Proxy
     def seconds_duration(value)
       value ? "#{value}s" : nil
     end
+
+    def network
+      proxy_config["network"] || NETWORK
+    end
 end