Improve docker build process

.github/workflows/docker.yml

@@ -43,7 +43,6 @@ jobs:
         uses: docker/build-push-action@v5
         with:
           context: .
-          file: ./docker/Dockerfile
           platforms: linux/amd64,linux/arm64
           push: true
           tags: ${{ steps.meta.outputs.tags }}

Dockerfile

@@ -0,0 +1,14 @@
+FROM --platform=$BUILDPLATFORM rust:alpine AS builder
+RUN apk add --no-cache musl-dev openssl-dev openssl-libs-static
+WORKDIR /app
+COPY ./src/ ./src/
+COPY ./crates/ ./crates/
+COPY ./.cargo/ ./cargo/
+COPY ./Cargo.toml ./Cargo.lock ./
+RUN cargo build --release
+
+FROM scratch
+COPY --from=builder /app/target/**/mchprs /
+VOLUME ["/data"]
+WORKDIR /data
+ENTRYPOINT ["/mchprs"]