build: optimize the development Dockerfile

docker/dev/app/Dockerfile

@@ -1,8 +1,8 @@
 FROM rust:1.80-bookworm
 
-RUN rustup target add wasm32-unknown-unknown
-RUN cargo install dioxus-cli diesel_cli
-RUN apt-get update && apt-get install -y nodejs npm supervisor
+RUN rustup target add wasm32-unknown-unknown && \
+    cargo install dioxus-cli diesel_cli && \
+    apt-get update && apt-get install -y nodejs npm supervisor
 
 COPY . /srv/app
 WORKDIR /srv/app