Make dockerfile multi-stage

With this it's possible to build the entire Cloudreve suite with a
single image.

This changes the assets version to use .Tag instead of .Version because
without it we get a mismatch between the frontend and the backend.

.goreleaser.yaml

@@ -4,7 +4,7 @@ before:
   hooks:
     - go mod tidy
     - chmod +x ./.build/build-assets.sh
-    - ./.build/build-assets.sh {{.Version}}
+    - ./.build/build-assets.sh {{.Tag}}
 
 builds:
   - env:

Dockerfile

@@ -1,3 +1,19 @@
+# Build stage
+
+FROM ghcr.io/goreleaser/goreleaser:v2.10.2 AS builder
+
+WORKDIR /src
+
+# Install goreleaser
+RUN apk add --no-cache bash curl git npm nodejs tar zip
+RUN npm install -g yarn
+
+# Perform the build
+COPY . .
+
+RUN goreleaser build --single-target --snapshot
+
+# Runtime stage
 FROM alpine:latest
 
 WORKDIR /cloudreve
@@ -16,7 +32,7 @@ ENV CR_ENABLE_ARIA2=1 \
     CR_SETTING_DEFAULT_media_meta_ffprobe=1
 
 COPY .build/aria2.supervisor.conf .build/entrypoint.sh ./
-COPY cloudreve ./cloudreve
+COPY --from=builder /src/dist/*/cloudreve ./cloudreve
 
 RUN chmod +x ./cloudreve \
     && chmod +x ./entrypoint.sh