improve sia docker builder image

docker-compose.yml

@@ -6,7 +6,11 @@ networks:
 
 services:
   sia:
-    image: nebulouslabs/sia:dev
+    build:
+      context: ./docker/sia
+      dockerfile: Dockerfile
+      args:
+        branch: master
     container_name: sia
     restart: unless-stopped
     environment:
@@ -21,7 +25,7 @@ services:
       - 9980
 
   sia-upload-legacy:
-    image: nebulouslabs/sia:dev
+    image: nebulouslabs/sia:alpine-latest
     container_name: sia-upload-legacy
     restart: unless-stopped
     environment:

docker/sia/Dockerfile

@@ -1,46 +1,14 @@
-FROM golang AS builder
-LABEL maintainer="NebulousLabs <devs@nebulous.tech>"
+FROM golang AS sia-builder
 
 ENV GOOS linux
 ENV GOARCH amd64
 
-RUN git clone https://gitlab.com/NebulousLabs/Sia.git && \
-    cd Sia && \
-    git checkout master && \
-    make release
+ARG branch=master
 
-RUN git clone https://github.com/NebulousLabs/docker-sia.git /docker-sia
+RUN git clone https://gitlab.com/NebulousLabs/Sia.git --single-branch --branch ${branch}
+RUN make release --directory Sia
 
-FROM alpine:3
-LABEL maintainer="NebulousLabs <devs@nebulous.tech>"
-LABEL autoheal=true
+FROM nebulouslabs/sia:alpine-latest
 
-ARG SIA_DIR="/sia"
-ARG SIA_DATA_DIR="/sia-data"
-ARG SIAD_DATA_DIR="/sia-data"
-
-RUN mkdir /lib64 && \
-    ln -s /lib/libc.musl-x86_64.so.1 /lib64/ld-linux-x86-64.so.2 && \
-    apk add --no-cache socat
-
-# Workaround for backwards compatibility with old images, which hardcoded the
-# Sia data directory as /mnt/sia. Creates a symbolic link so that any previous
-# path references stored in the Sia host config still work.
-RUN ln -s "$SIA_DATA_DIR" /mnt/sia
-
-WORKDIR "$SIA_DIR"
-
-ENV SIA_DATA_DIR "$SIA_DATA_DIR"
-ENV SIAD_DATA_DIR "$SIAD_DATA_DIR"
-ENV SIA_MODULES gctwhr
-
-COPY --from=builder /go/bin/siac .
-COPY --from=builder /go/bin/siad .
-COPY --from=builder /docker-sia/scripts/healthcheck.sh .
-COPY --from=builder /docker-sia/scripts/run.sh .
-
-EXPOSE 9980 9981 9982
-
-HEALTHCHECK --interval=10s CMD ["./healthcheck.sh"]
-
-ENTRYPOINT ["./run.sh"]
+COPY --from=sia-builder /go/bin/siac /sia/siac
+COPY --from=sia-builder /go/bin/siad /sia/siad