cache apt

Dockerfile

@@ -1,22 +1,26 @@
 FROM rust:1.74 as build
 
+ENV DEBIAN_FRONTEND=noninteractive
+RUN --mount=type=cache,target=/var/lib/apt/lists,sharing=locked \
+	--mount=type=cache,target=/var/cache/apt,sharing=locked \
+	rm -f /etc/apt/apt.conf.d/docker-clean \
+	&& apt-get update \
+	&& apt-get -y --no-install-recommends install musl-tools=1.2.3-1
+
 ENV CARGO_BUILD_TARGET=x86_64-unknown-linux-musl \
-    DEBIAN_FRONTEND=noninteractive \
-    PKG_CONFIG_ALLOW_CROSS=1
+	PKG_CONFIG_ALLOW_CROSS=1
 
 WORKDIR /app
 
 COPY . .
 
 RUN --mount=type=cache,target=/app/target \
-    --mount=type=cache,target=/usr/local/cargo/registry \
-    --mount=type=cache,target=/usr/local/cargo/git \
-    --mount=type=cache,target=/usr/local/rustup \
-    apt-get update \
-	&& apt-get -y --no-install-recommends install musl-tools \
-    && rustup install stable \
+	--mount=type=cache,target=/usr/local/cargo/registry \
+	--mount=type=cache,target=/usr/local/cargo/git \
+	--mount=type=cache,target=/usr/local/rustup \
+	rustup install stable \
 	&& rustup target add ${CARGO_BUILD_TARGET} \
-    && cargo build --package serve --release \
+	&& cargo build --package serve --release \
 	&& mkdir -p /build \
 	&& cp /app/target/${CARGO_BUILD_TARGET}/release/serve /build/ \
 	&& strip /build/serve