feat: Add GitHub Container Registry (GHCR) support with automated builds

- Add GitHub Actions workflow to build and push Docker images to GHCR
- Create root-level docker-compose.yml using pre-built ghcr.io/cyph3rasi/synapsis:latest image
- Update docker/README.md with new simplified installation instructions
- Update main README.md with quick start Docker instructions
- Users can now deploy without cloning: just download compose file + Caddyfile + .env
- Supports automatic tagging: latest, semver, sha, branch names
- Multi-platform builds: linux/amd64, linux/arm64
- Includes SBOM generation for security tracking

.env.example

@@ -1,29 +1,54 @@
 # ===========================================
-# Synapsis Environment Configuration
+# Synapsis Docker Environment Configuration
 # ===========================================
-# Copy this file to .env and fill in your values
+# Copy this file to .env and configure your values
 
-# Database (Required)
-DATABASE_URL=postgresql://user:password@localhost/synapsis
+# ===========================================
+# Required Settings
+# ===========================================
 
-# Authentication (Required)
+# Domain Configuration
+# Replace with your actual domain
+DOMAIN=your-domain.com
+
+# Database Credentials
+# Change these to secure values!
+DB_USER=synapsis
+DB_PASSWORD=your-secure-password-here
+DB_NAME=synapsis
+
+# Authentication Secret
 # Generate with: openssl rand -hex 32
-AUTH_SECRET=your-secret-key-here
+AUTH_SECRET=your-secret-key-here-minimum-32-characters
 
-# Node Configuration (Required)
-NEXT_PUBLIC_NODE_DOMAIN=your-domain.com
+# Admin Users
+# Comma-separated list of email addresses with admin access
+ADMIN_EMAILS=admin@your-domain.com
 
-# Admin Users (Required)
-# Comma-separated list of email addresses that have admin access
-ADMIN_EMAILS=admin@example.com
+# ===========================================
+# S3-Compatible Storage (Required for uploads)
+# ===========================================
+# You can use AWS S3, MinIO, Wasabi, Backblaze B2, etc.
 
-# S3-Compatible Storage (Required for media uploads)
 STORAGE_ENDPOINT=https://s3.your-provider.com
 STORAGE_REGION=us-east-1
-STORAGE_BUCKET=synapsis
+STORAGE_BUCKET=synapsis-uploads
 STORAGE_ACCESS_KEY=your-access-key
 STORAGE_SECRET_KEY=your-secret-key
 STORAGE_PUBLIC_BASE_URL=https://cdn.your-domain.com
 
+# ===========================================
 # Optional Settings
+# ===========================================
+
+# Maximum bots per user (default: 5)
 # BOT_MAX_PER_USER=5
+
+# Redis configuration (if using external Redis)
+# REDIS_URL=redis://redis:6379
+
+# ===========================================
+# Docker Compose Settings
+# ===========================================
+
+# COMPOSE_PROJECT_NAME=synapsis