feat(mvp): phase 1 - project scaffolding & tooling

Initialize SvelteKit project with Svelte 5, TypeScript strict, Tailwind CSS v4,
shadcn-svelte, Prisma + SQLite, Vitest, ESLint, Prettier. Add Docker multi-stage
build, docker-compose, and Gitea Actions CI pipeline.

docker-compose.yml

@@ -0,0 +1,28 @@
+services:
+  web-app-launcher:
+    build: .
+    container_name: web-app-launcher
+    restart: unless-stopped
+    ports:
+      - '${APP_PORT:-3000}:3000'
+    environment:
+      - DATABASE_URL=file:/app/data/launcher.db
+      - JWT_SECRET=${JWT_SECRET:-change-me-to-a-random-64-char-string}
+      - JWT_EXPIRY=${JWT_EXPIRY:-15m}
+      - REFRESH_TOKEN_EXPIRY=${REFRESH_TOKEN_EXPIRY:-7d}
+      - GUEST_MODE=${GUEST_MODE:-true}
+      - HEALTHCHECK_CRON=${HEALTHCHECK_CRON:-*/5 * * * *}
+      - HEALTHCHECK_TIMEOUT_MS=${HEALTHCHECK_TIMEOUT_MS:-5000}
+      - NODE_ENV=production
+      - APP_PORT=3000
+      - APP_HOST=0.0.0.0
+    volumes:
+      - launcher-data:/app/data
+    networks:
+      - launcher-net
+
+volumes:
+  launcher-data:
+
+networks:
+  launcher-net: