Initial commit: ozon-mock Go server

- Mock Ozon Seller API endpoints
- Products, Postings, Finance, Returns, Analytics
- JSON fixtures for testing
- Docker support
- Gitea Actions CI/CD

Dockerfile

@@ -0,0 +1,11 @@
+FROM alpine:3.20
+
+RUN apk --no-cache add ca-certificates tzdata
+
+COPY ozon-mock /usr/local/bin/ozon-mock
+
+EXPOSE 8080
+
+ENV PORT=8080
+
+CMD ["/usr/local/bin/ozon-mock"]