chore(*): adopt project templates

frontend/.dockerignore

@@ -0,0 +1,5 @@
+node_modules
+.svelte-kit
+build
+.env
+.env.*

frontend/.env.example

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+PUBLIC_API_BASE_URL=/api
+ALLOWED_HOSTS=

frontend/CLAUDE.md

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+## Checking commands
+After writing code, always run from `frontend/`:
+```shell
+bun fix
+bun check
+```

frontend/Makefile

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+COMPOSE := cd .. && docker compose
+changed = ! git diff --quiet $(1) -- $(2) 2>/dev/null
+stamp = { git update-ref $(1) HEAD 2>/dev/null || true; }
+
+.PHONY: fmt check build pre-deploy post-deploy dev
+
+fmt:
+	bun run fix
+
+check:
+	bun run check
+	bun run lint
+
+build:
+	$(COMPOSE) run --rm frontend-dev sh -c "bun install && bun run build"
+
+pre-deploy:
+	@if $(call changed,refs/deploy/frontend,.) || ! test -d build; then \
+		$(MAKE) build && $(call stamp,refs/deploy/frontend); \
+	fi
+
+post-deploy:
+	@:
+
+dev:
+	bun run dev

frontend/docker-compose.override.yml.example

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+services:
+  frontend-dev:
+    networks:
+      default: {}
+      caddy:
+        aliases:
+          - beavergram-frontend
+
+networks:
+  caddy:
+    external: true

frontend/docker-compose.yml

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+services:
+  frontend-dev:
+    image: oven/bun:alpine
+    profiles: [frontend-dev]
+    restart: unless-stopped
+    working_dir: /app
+    env_file:
+      - path: .env
+        required: false
+      - path: frontend/.env
+        required: false
+    environment:
+      API_PROXY_TARGET: http://api:8080
+    volumes:
+      - ./frontend:/app
+      - frontend_node_modules:/app/node_modules
+      - frontend_svelte_kit:/app/.svelte-kit
+    command: [sh, -c, "bun install && bun run dev --host 0.0.0.0 --port 3000"]
+
+volumes:
+  frontend_node_modules:
+  frontend_svelte_kit: