ci: update Container streamlining

Use scratch as base instead of alpine
Update LABELS and build args

Author: BoxBoxJason

.github/workflows/release.yml

@@ -42,7 +42,9 @@ jobs:
           push: true
           sbom: true
           build-args: |
-            GITLAB_SYNC_VERSION=${{ github.ref_name }}
+            VERSION=${{ github.ref_name }}
+            REVISION=${{ github.sha }}
+            BUILD_DATE=${{ github.event.head_commit.timestamp }}
           tags: |
             ghcr.io/${{ env.REPO_NAME }}:${{ github.ref_name }}
             ghcr.io/${{ env.REPO_NAME }}:${{ env.MAJOR }}.${{ env.MINOR }}

Containerfile

@@ -1,21 +1,34 @@
-FROM docker.io/golang:1.23.7-alpine AS build
+FROM docker.io/golang:1.24.2-alpine AS build
 
-ARG GITLAB_SYNC_VERSION="dev"
+ARG VERSION="dev"
 
 WORKDIR /app
 
 COPY go.mod .
 COPY ./cmd/ ./cmd/
-COPY ./mirroring/ ./mirroring/
-COPY ./utils/ ./utils/
+COPY ./internal/ ./internal/
+
+ENV GO111MODULE=on \
+    CGO_ENABLED=0
 
 RUN go mod tidy && \
-    go build -ldflags "-X 'main.version=${GITLAB_SYNC_VERSION}'" -o /app/bin/gitlab-sync ./cmd/main.go
+    go build -ldflags "-X 'main.version=${VERSION}'" -o /app/bin/gitlab-sync ./cmd/main.go
+
+FROM scratch
 
-FROM docker.io/alpine:latest
+ARG BUILD_DATE="1970-01-01T00:00:00Z" \
+    VERSION="dev" \
+    REVISION="dev"
 
-RUN adduser -u 1000 -D -S gitlab-sync
+LABEL org.opencontainers.image.title="gitlab-sync" \
+    org.opencontainers.image.description="synchronize GitLab projects and groups between two GitLab instances" \
+    org.opencontainers.image.source="${SOURCE}" \
+    org.opencontainers.image.url="gitlab.com/boxboxjason/gitlab-sync" \
+    org.opencontainers.image.created="${BUILD_DATE}" \
+    org.opencontainers.image.revision="${REVISION}" \
+    org.opencontainers.image.version="${VERSION}" \
+    org.opencontainers.image.vendor="boxboxjason"
 
-COPY --from=build --chown=gitlab-sync --chmod=550 /app/bin/gitlab-sync /usr/local/bin/gitlab-sync
+COPY --from=build /app/bin/gitlab-sync /usr/local/bin/gitlab-sync
 
 ENTRYPOINT [ "/usr/local/bin/gitlab-sync" ]