shrink docker image size in half, adding back ForceColor for logrus

Dockerfile

@@ -1,4 +1,5 @@
 FROM golang:1.23.1-alpine AS builder
+RUN apk add --no-cache tzdata
 COPY src /src
 ENV GOCACHE=/root/.cache/go-build
 WORKDIR /src
@@ -7,16 +8,17 @@ RUN --mount=type=cache,target="/go/pkg/mod" \
     go mod download && \
     CGO_ENABLED=0 GOOS=linux go build -pgo=auto -o go-proxy github.com/yusing/go-proxy
 
-FROM alpine:3.20
+FROM scratch
 
 LABEL maintainer="yusing@6uo.me"
 
-RUN apk add --no-cache tzdata
+# copy timezone data
+COPY --from=builder /usr/share/zoneinfo /usr/share/zoneinfo
+
 # copy binary
 COPY --from=builder /src/go-proxy /app/
 COPY schema/ /app/schema
 
-RUN chmod +x /app/go-proxy
 ENV DOCKER_HOST=unix:///var/run/docker.sock
 ENV GOPROXY_DEBUG=0
 

src/main.go

@@ -44,6 +44,7 @@ func main() {
 			DisableSorting:         true,
 			DisableLevelTruncation: true,
 			FullTimestamp:          true,
+			ForceColors:            true,
 			TimestampFormat:        "01-02 15:04:05",
 		})
 	}