init: hgmj server initial commit

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

app/service/officialWebsiteser/common.go

@@ -0,0 +1,13 @@
+package officialWebsiteser
+
+func transPageAndPageNumber(pageSize, pageNumber int64) (skip int64, limit int64) {
+	if pageNumber <= 0 {
+		pageNumber = 1
+	}
+	if pageSize <= 0 {
+		pageSize = 20
+	}
+	skip = (pageNumber - 1) * pageSize
+	limit = pageSize
+	return skip, limit
+}