workflow: fix goreleaser config and containerfile

Containerfile

@@ -0,0 +1,15 @@
+FROM golang:1.23 as builder
+LABEL authors="nite07"
+
+WORKDIR /app
+COPY . .
+RUN go mod download
+ARG version
+RUN CGO_ENABLED=0 GOOS=linux go build -ldflags="-s -w -X github.com/bestnite/sub2sing-box/constant.Version=${version}" -o sub2sing-box .
+WORKDIR /app
+
+FROM alpine:latest
+COPY --from=builder /app/sub2sing-box /app/sub2sing-box
+VOLUME [ "/app/templates" ]
+EXPOSE 8080
+CMD ["/app/sub2sing-box", "server"]