Updade .env.example, .gitignore, and include nginx for load balancing

.env.example

@@ -0,0 +1,2 @@
+# DATABASE_URL="mysql://testuser:123pass@database:3306/biblioteca"
+# JWT_ACCESS_SECRET=fghjdsklgh

.gitignore

@@ -1,3 +1,4 @@
 node_modules
 # Keep environment variables out of version control
 .env
+data

docker-compose.yml

@@ -1,12 +1,40 @@
 version: '3'
 
 services:
-  server:
+  api01: &api
     build: ./
     ports:
       - "3000:3000"
     depends_on:
       - database
+    deploy:
+      resources:
+        limits:
+          cpus: '0.15'
+          memory: '0.4GB'
+    command: sh -c "sleep 10 && npx prisma migrate deploy"
+    networks:
+      - API
+
+  api02:
+    <<: *api
+    ports:
+      - "3001:3000"
+
+  nginx: # Load Balancer
+    image: nginx:latest
+    volumes:
+      - ./nginx.conf:/etc/nginx/nginx.conf:ro
+    depends_on:
+      - api01
+      - api02
+    deploy:
+      resources:
+        limits:
+          cpus: '0.15'
+          memory: '0.5GB'
+    ports:
+      - "9999:9999"
     networks:
       - API
 

nginx.conf

@@ -0,0 +1,46 @@
+worker_processes auto;
+worker_rlimit_nofile 500000;
+
+events {
+    use epoll;
+    worker_connections 1024;
+}
+
+http {
+    access_log off;
+    error_log /dev/null emerg;
+
+    upstream api {
+        server api01:3000;
+        server api02:3001;  # Alterei de localhost para o nome do serviço
+        keepalive 200;
+    }
+
+    server {
+        listen 9999;
+        location / {
+            proxy_buffering off;
+            proxy_set_header Host $host;
+            proxy_set_header X-Real-IP $remote_addr;
+            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+            proxy_set_header X-Forwarded-Proto $scheme;
+            proxy_set_header Connection "";
+
+            # Simple requests
+            if ($request_method ~* "(GET|POST)") {
+                add_header "Access-Control-Allow-Origin"  *;
+            }
+
+            # Preflighted requests
+            if ($request_method = OPTIONS ) {
+                add_header "Access-Control-Allow-Origin"  *;
+                add_header "Access-Control-Allow-Methods" "GET, POST, OPTIONS, HEAD";
+                add_header "Access-Control-Allow-Headers" "Authorization, Origin, X-Requested-With, Content-Type, Accept";
+                return 200;
+            }
+
+            proxy_http_version 1.1;
+            proxy_pass http://api;
+        }
+    }
+}