Merge branch 'main' into auto-push-env

lib/kamal/configuration.rb

@@ -226,6 +226,7 @@ class Kamal::Configuration
       && ensure_required_keys_present \
       && ensure_valid_kamal_version \
       && ensure_retain_containers_valid \
+      && ensure_valid_service_name \
       && ensure_push_env_valid
   end
 
@@ -291,6 +292,12 @@ class Kamal::Configuration
       true
     end
 
+    def ensure_valid_service_name
+      raise ArgumentError, "Service name can only include alphanumeric characters, hyphens, and underscores" unless raw_config[:service] =~ /^[a-z0-9-_]+$/
+
+      true
+    end
+
     def ensure_valid_kamal_version
       if minimum_version && Gem::Version.new(minimum_version) > Gem::Version.new(Kamal::VERSION)
         raise ArgumentError, "Current version is #{Kamal::VERSION}, minimum required is #{minimum_version}"