chore: finalize amount migration fixes

backend/Dockerfile

@@ -3,6 +3,7 @@
 FROM golang:1.26-alpine AS build
 
 WORKDIR /src
+ARG GOOSE_VERSION=v3.27.1
 ARG GOPROXY=https://goproxy.cn,direct
 ARG GOSUMDB=sum.golang.google.cn
 ENV GOPROXY=${GOPROXY} \
@@ -11,6 +12,9 @@ ENV GOPROXY=${GOPROXY} \
 COPY go.mod go.sum* ./
 RUN --mount=type=cache,target=/go/pkg/mod go mod download
 COPY . .
+RUN --mount=type=cache,target=/go/pkg/mod \
+    --mount=type=cache,target=/root/.cache/go-build \
+    go install github.com/pressly/goose/v3/cmd/goose@${GOOSE_VERSION}
 RUN --mount=type=cache,target=/go/pkg/mod \
     --mount=type=cache,target=/root/.cache/go-build \
     CGO_ENABLED=0 GOOS=linux go build -o /out/hfb-api ./cmd/api
@@ -21,5 +25,7 @@ WORKDIR /app
 ENV TZ=Asia/Shanghai
 RUN apk add --no-cache tzdata
 COPY --from=build /out/hfb-api /app/hfb-api
+COPY --from=build /go/bin/goose /app/goose
+COPY --from=build /src/migrations /app/migrations
 EXPOSE 8080
 CMD ["/app/hfb-api"]