chore(dockerfile): switch base image to debian and update curl setup

- Replace Alpine with Debian Slim for the runtime environment
- Update curl installation process to use apt-get for compatibility

Dockerfile

@@ -14,10 +14,12 @@ COPY import_map.json ./import_map.json
 RUN deno task compile
 
 # -------- Stage 2: Minimal runtime environment --------
-FROM alpine:latest
+FROM debian:bookworm-slim
 
-# Optional: Install curl for container-level health checks (not needed for production-only binaries)
-RUN apk add --no-cache curl
+# Optional: Install curl for container-level health checks
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends curl \
+    && rm -rf /var/lib/apt/lists/*
 
 # Copy only the compiled application binary from the builder stage
 COPY --from=builder /app/app /app/app