build: optimize the production Dockerfile

docker/prod/app/Dockerfile

@@ -1,4 +1,4 @@
-FROM rust:1.80-bookworm as builder
+FROM rust:1.80-bookworm AS builder
 
 RUN rustup target add wasm32-unknown-unknown && \
     cargo install dioxus-cli diesel_cli && \
@@ -16,7 +16,14 @@ FROM debian:bookworm-slim AS runner
 RUN apt-get update && apt-get install -y libpq5
 
 COPY --from=builder /srv/app/dist /srv/app/dist
-COPY ./.env /srv/app/.env
+COPY .env /srv/app/.env
+
+RUN chown -R 1000:1000 /srv/app
 
 WORKDIR /srv/app
+
+HEALTHCHECK CMD curl --fail http://localhost:8000 || exit 1
+
+USER 1000:1000
+
 CMD ["./dist/todo-baggins"]