From fe0bd566263b48c844b996faa1b8402c648ddcf3 Mon Sep 17 00:00:00 2001
From: Egor Aristov <ef@efprojects.com>
Date: Sat, 8 Feb 2025 22:02:06 +0300
Subject: [PATCH] add replicas to docker-compose to show scaling ability;
 update readme

---
 README.md                 | 8 +++++++-
 deploy/docker-compose.yml | 2 ++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 9ab3784..844ddd1 100644
--- a/README.md
+++ b/README.md
@@ -53,17 +53,23 @@ Docker-compose deployment uses [deploy/.env file](deploy/.env)
 
 You can see all available options in [config.go file](internal/config/config.go) (struct Config)
 
+### Scaling
+
+Each worker can process 1 page at a time, so to scale you should run multiple worker instances. This is done using replicas parameter in worker section in [docker-compose.yml file](deploy/docker-compose.yml)
+
 ## Development
 
-You need Go 1.23 (most of application) and Node.js 20 (frontend)
+You need Go 1.23 (most of application), Node.js 20 (frontend) and Nats server.
 
 Instaling dependencies example for MacOS:
 
 ```bash
 brew install go@1.23
 brew install node@20
+brew install nats-server  # Don't use brew services to manage nats because it lacks config support
 go mod download
 cd frontend/wizard-vue && npm install
+nats -js
 ```
 
 Also this repository contains some useful git hooks. To enable them, use:
diff --git a/deploy/docker-compose.yml b/deploy/docker-compose.yml
index 16f57c4..9507fc2 100644
--- a/deploy/docker-compose.yml
+++ b/deploy/docker-compose.yml
@@ -21,6 +21,8 @@ services:
     user: pwuser
     security_opt:
       - seccomp:seccomp_profile.json
+    deploy:
+      replicas: 1
     restart: unless-stopped
 
   nats: