chore: baseline snapshot before moderation-strictness feature

Repo .git was damaged (refs/ missing, index truncated, object store near-empty).
Repaired via git init (rebuilt refs), stale index preserved as .git/index.corrupt-20260910.bak,
then full worktree committed as a rollback baseline.

Dockerfile

@@ -0,0 +1,26 @@
+FROM golang:1.20-alpine as builder
+
+WORKDIR /app
+
+ENV CGO_ENABLED=0
+
+ARG GITHUB_SHA=dev
+
+COPY . .
+
+RUN go mod tidy
+RUN go build -v -ldflags "-w -s -extldflags '-static' -X 'github.com/NekoWheel/NekoBox/internal/conf.BuildCommit=$GITHUB_SHA'" -o NekoBox ./cmd/
+
+FROM alpine:latest
+
+RUN apk update && apk add tzdata && cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime \
+&& echo "Asia/Shanghai" > /etc/timezone
+
+WORKDIR /home/app
+
+COPY --from=builder /app/NekoBox .
+
+RUN chmod 777 /home/app/NekoBox
+
+ENTRYPOINT ["./NekoBox", "web"]
+EXPOSE 8080