init project

app/controllers/projects/project_applies_controller.rb

@@ -0,0 +1,14 @@
+class Projects::ProjectAppliesController < Projects::BaseController
+  def create
+    project = Projects::ApplyJoinService.call(current_user, create_params)
+    render_ok(project_id: project.id)
+  rescue Projects::ApplyJoinService::Error => ex
+    render_error(ex.message)
+  end
+
+  private
+
+  def create_params
+    params.permit(:code, :role)
+  end
+end