chore: scaffold monorepo for EventSnap

- Rust/Axum backend skeleton with all crates, multi-stage Dockerfile
- SvelteKit + TypeScript frontend with Tailwind CSS v4, adapter-node, Dockerfile
- docker-compose.yml: db (postgres:16) → app → frontend → caddy with healthcheck and named volumes
- Caddyfile: TLS via Let's Encrypt, cache headers, API/media routing to backend
- .env.example: all environment variables documented with defaults
- README.md: project overview, features, stack, deploy guide, roadmap
- .gitignore: excludes secrets, build artifacts, node_modules, media uploads

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docker-compose.yml

@@ -0,0 +1,59 @@
+services:
+  db:
+    image: postgres:16-alpine
+    restart: unless-stopped
+    env_file: .env
+    environment:
+      POSTGRES_USER: ${POSTGRES_USER}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+      POSTGRES_DB: ${POSTGRES_DB}
+    volumes:
+      - postgres_data:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U ${POSTGRES_USER} -d ${POSTGRES_DB}"]
+      interval: 5s
+      timeout: 5s
+      retries: 10
+
+  app:
+    build:
+      context: ./backend
+      dockerfile: Dockerfile
+    restart: unless-stopped
+    env_file: .env
+    depends_on:
+      db:
+        condition: service_healthy
+    volumes:
+      - media_data:/media
+    expose:
+      - "3000"
+
+  frontend:
+    build:
+      context: ./frontend
+      dockerfile: Dockerfile
+    restart: unless-stopped
+    env_file: .env
+    depends_on:
+      - app
+    expose:
+      - "3001"
+
+  caddy:
+    image: caddy:2-alpine
+    restart: unless-stopped
+    ports:
+      - "80:80"
+      - "443:443"
+    volumes:
+      - ./Caddyfile:/etc/caddy/Caddyfile:ro
+      - caddy_data:/data
+    depends_on:
+      - app
+      - frontend
+
+volumes:
+  postgres_data:
+  media_data:
+  caddy_data: