chore(postgres_db): Relocated database files to outside backend, init DockerFile, expand docker-compose

This commit relocates the database files to outside the backend folder, to the root aurganize folder.
- we initialise the backend Dockerfile.dev
- we expand the docker-compose to migrate our backend to docker

This improves developer experience and standardizes database operations for the entire backend team.

Story: E1-004 - PostgreSQL Database Setup

backend/DockerFile.dev

@@ -0,0 +1,33 @@
+# backend/Dockerfile.dev
+# Development Dockerfile with hot reload support
+
+# Stage 1: Base image with Go tools
+FROM golang:1.21-alpine AS base
+
+# Install developement tools
+# - git: Required for go get
+# - gcc, musl-dev: Required for CGO (some packages need C compiler)
+# - air: Hot reload tool for GO
+RUN apk add --no-cache \
+    git \
+    gcc \
+    musl-dev && \
+    go install github.com/air-verse/air@latest
+
+
+# Set working directory
+WORKDIR /app
+
+# Stage 2: Development environment
+FROM base as development
+
+# Copy dependency files first (for layer caching)
+COPY go.mod go.sum./
+
+# Download dependencies
+# This layer is cached unless go.mod or go.sum changes
+RUN go mod download
+
+# Copy Air configuration
+
+COPY .air.t

infrastructure/docker/docker-compose.yml

@@ -1,6 +1,10 @@
+# docker-compose.yml
 version: '3.8'
 
+# Define all services that make up Aurganize
 services:
+  
+  # PostgreSQL 14 - Primary database
   postgres:
     image: postgres:14-alpine
     container_name: aurganize-postgres
@@ -21,5 +25,147 @@ services:
       timeout: 5s
       retries: 5
 
+    networks:
+      - aurganize-network
+
+  # Redis 7 - Caching and session storage
+  redis:
+    image: redis:7-alpine
+    container_name: aurganize-redis
+    restart: unless-stopped
+    command: redis-server --appendonly yes
+    ports:
+      - "6379:6379"
+    volumes:
+      - redis_data:/data
+    healthcheck:
+      test: ["CMD", "redis-cli", "ping"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+    networks:
+      - aurganize-network
+
+  # NATS with JetStream - Event bus
+  nats:
+    image: nats:latest
+    container_name: aurganize-nats
+    restart: unless-stopped
+    command: ["-js", "-m", "8222"]
+    ports:
+      - "4222:4222"  # Client connections
+      - "8222:8222"  # HTTP monitoring
+    volumes:
+      - nats_data:/data
+    healthcheck:
+      test: ["CMD", "wget", "--spider", "-q", "http://localhost:8222/healthz"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+    networks:
+      - aurganize-network
+
+  # MinIO - S3-compatible object storage
+  minio:
+    image: minio/minio:latest
+    container_name: aurganize-minio
+    restart: unless-stopped
+    command: server /data --console-address ":9001"
+    environment:
+      MINIO_ROOT_USER: minioadmin
+      MINIO_ROOT_PASSWORD: minioadmin
+    ports:
+      - "9000:9000"  # API
+      - "9001:9001"  # Web Console
+    volumes:
+      - minio_data:/data
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:9000/minio/health/live"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+    networks:
+      - aurganize-network
+
+  # Backend - Go API server
+  backend:
+    build:
+      context: ./../../backend
+      dockerfile: Dockerfile.dev
+    container_name: aurganize-backend
+    restart: unless-stopped
+    environment:
+      # Application config
+      ENV: development
+      PORT: 8080
+      
+      # Database connection
+      DB_HOST: postgres
+      DB_PORT: 5432
+      DB_USER: aurganize
+      DB_PASSWORD: dev_password_change_in_prod
+      DB_NAME: aurganize
+      DB_SSL_MODE: disable
+      
+      # Redis connection
+      REDIS_HOST: redis
+      REDIS_PORT: 6379
+      REDIS_PASSWORD: ""
+      
+      # NATS connection
+      NATS_URL: nats://nats:4222
+      
+      # MinIO connection
+      MINIO_ENDPOINT: minio:9000
+      MINIO_ACCESS_KEY: minioadmin
+      MINIO_SECRET_KEY: minioadmin
+      MINIO_USE_SSL: false
+      
+      # JWT secrets (development only)
+      JWT_SECRET: dev-secret-change-in-production
+      
+      # CORS settings
+      CORS_ORIGINS: http://localhost:3000
+    ports:
+      - "8080:8080"
+    volumes:
+      # Mount source code for hot reload
+      - ./backend:/app
+      # Exclude node_modules and vendor
+      - /app/vendor
+      - /app/bin
+    depends_on:
+      postgres:
+        condition: service_healthy
+      redis:
+        condition: service_healthy
+      nats:
+        condition: service_healthy
+      minio:
+        condition: service_healthy
+    healthcheck:
+      test: ["CMD", "wget", "--spider", "-q", "http://localhost:8080/health"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+    networks:
+      - aurganize-network
+
+  # Frontend - React application
+  # TODO
+
+# Named volumes for data persistence
 volumes:
   postgres_data:
+    driver: local
+  redis_data:
+    driver: local
+  nats_data:
+    driver: local
+  minio_data:
+    driver: local
+
+# Custom network for service isolation
+networks:
+  aurganize-network:
+    driver: bridge