Add initial Docker setup with API services, database, and Nginx configuration

.dockerignore

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+node_modules
+dist
+*.log
+*.md
+.git

Dockerfile

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+# Use the official Node.js image as the base image
+FROM node:22
+
+# Set the working directory inside the container
+WORKDIR /app
+
+# Copy package.json and package-lock.json to the working directory
+COPY package*.json ./
+
+# Install the application dependencies
+RUN yarn install
+
+# Copy the rest of the application files
+COPY . .
+
+# Build the NestJS application
+RUN yarn build
+
+# Expose the application port
+EXPOSE 9999
+
+# Command to run the application
+CMD ["node", "dist/main"]

docker-compose.yml

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+services:
+  api1:
+    container_name: api1
+    hostname: api1
+    build:
+      context: .
+      dockerfile: Dockerfile
+    networks:
+      - backend
+      - payment-processor
+    volumes:
+      - .:/app
+    depends_on:
+      - redis
+      - database
+    deploy:
+      resources:
+        limits:
+          cpus: "0.15"
+          memory: "80MB"
+    healthcheck:
+      test: [ "CMD", "curl", "-f", "http://localhost:9999" ]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+
+  api2:
+    container_name: api2
+    hostname: api2
+    build:
+      context: .
+      dockerfile: Dockerfile
+    depends_on:
+      - redis
+      - database
+    networks:
+      - backend
+      - payment-processor
+    volumes:
+      - .:/app
+    deploy:
+      resources:
+        limits:
+          cpus: "0.15"
+          memory: "80MB"
+    healthcheck:
+      test: [ "CMD", "curl", "-f", "http://localhost:9999" ]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+
+  nginx:
+    image: nginx:latest
+    container_name: nginx
+    hostname: nginx
+    ports:
+      - "9999:80"
+    volumes:
+      - ./nginx.conf:/etc/nginx/nginx.conf
+    networks:
+      - backend
+    depends_on:
+      - api1
+      - api2
+    deploy:
+      resources:
+        limits:
+          cpus: "0.10"
+          memory: "20MB"
+
+  redis:
+    image: redis:7.2-alpine
+    hostname: redis
+    platform: linux/amd64
+    ports:
+      - "6379:6379"
+    networks:
+      - backend
+    deploy:
+      resources:
+        limits:
+          cpus: "0.05"
+          memory: "20MB"
+  database:
+    container_name: database
+    image: postgres:alpine
+    hostname: database
+    platform: linux/amd64
+    ports:
+      - "5432:5432"
+    healthcheck:
+      test: [ "CMD-SHELL", "pg_isready -U rinha -d rinha" ]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+    environment:
+      - POSTGRES_DB=payment
+      - POSTGRES_USER=postgres
+      - POSTGRES_PASSWORD=postgres_pwd
+    volumes:
+      - database_volume:/var/lib/postgresql/data
+      - ./docker/db_init/:/docker-entrypoint-initdb.d/
+    networks:
+      - backend
+    deploy:
+      resources:
+        limits:
+          cpus: "0.5"
+          memory: "110MB"
+
+networks:
+  backend:
+    driver: bridge
+  payment-processor:
+    external: true
+
+volumes:
+  database_volume:

docker/db_init/init.sql

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+CREATE UNLOGGED TABLE payments (
+    id UUID PRIMARY KEY,
+    correlation_id UUID NOT NULL,
+    amount DECIMAL NOT NULL,
+    payment_processor VARCHAR(50) NOT NULL,
+    created_at TIMESTAMP default now() NOT NULL
+);
+
+CREATE INDEX payments_created_at ON payments (created_at );
+CREATE INDEX payments_correlation_id ON payments (correlation_id);

local.Dockerfile

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+FROM node:22-alpine
+
+WORKDIR /app
+COPY package.json .
+COPY . .
+RUN yarn install -y \
+  && yarn build
+
+ENTRYPOINT [ "yarn", "start:dev" ]

nginx.conf

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+worker_processes auto;
+worker_rlimit_nofile 65535;
+
+events {
+  worker_connections 4096;
+  use epoll;
+  multi_accept on;
+  accept_mutex off;
+}
+
+http {
+  access_log off;
+  error_log /dev/null crit;
+
+  sendfile on;
+  tcp_nopush on;
+  tcp_nodelay on;
+
+  keepalive_timeout 65;
+  keepalive_requests 1000000;
+
+  client_max_body_size 1k;
+  client_body_timeout 1s;
+  client_header_timeout 1s;
+
+  upstream backend_pool {
+    least_conn;
+    server api1:9999 max_fails=1 fail_timeout=1s weight=1;
+    server api2:9999 max_fails=1 fail_timeout=1s weight=1;
+    keepalive 3072;
+    keepalive_requests 100000;
+    keepalive_timeout 120s;
+  }
+
+  server {
+    listen 9999 default_server;
+
+    location / {
+      proxy_pass http://backend_pool;
+      proxy_http_version 1.1;
+      proxy_set_header Connection "";
+      proxy_buffering off;
+      proxy_cache off;
+      proxy_store off;
+      proxy_connect_timeout 100ms;
+      proxy_send_timeout 2s;
+      proxy_read_timeout 2s;
+      proxy_next_upstream error timeout invalid_header http_500 http_502 http_503;
+    }
+  }
+}