chore: reduce docker image size

Author: go-bai

.github/workflows/docker-image.yml

@@ -10,12 +10,20 @@ jobs:
   build:
     runs-on: ubuntu-latest
 
+    strategy:
+      matrix:
+        goos: [linux]
+        goarch: [amd64, arm64]
     steps:
     - uses: actions/checkout@v3
     - name: Docker Login
       env:
         DOCKER_USER: ${{ secrets.DOCKER_USER }}
         DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}
+        GOOS: ${{ matrix.goos }}
+        GOARCH: ${{ matrix.goarch }}
+        CGO_ENABLED: 0
+        GO111MODULE: on
       run: |
         docker login -u $DOCKER_USER -p $DOCKER_PASSWORD
     - name: Build the Docker image

Dockerfile

@@ -1,20 +1,14 @@
 FROM golang:1.20 AS builder
-
-ENV GO111MODULE=on \
-    CGO_ENABLED=0 \
-    GOOS=linux \
-    GOARCH=amd64
-
+RUN apk --no-cache add tzdata
 WORKDIR /build
 COPY . .
 RUN go mod tidy && go build -ldflags "-s -w" -o main
 
 
-FROM alpine
-
-RUN  apk --update --no-cache add tzdata ca-certificates \
-    && cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime \
-    && mkdir -p conf && touch conf/whitelist
+FROM scratch
+COPY --from=builder /user/share/zoneinfo /user/share/zoneinfo
+COPY --from=builder /build/conf conf
 COPY --from=builder /build/main /
+ENV TZ=Asia/Shanghai
 
 ENTRYPOINT ["/main"]