feat(backend,docker,docs): implement Go/Gin/SQLite REST API server, Docker containerization, and architecture specifications

- Implement standalone Go backend API server using Gin and pure-Go SQLite (modernc.org/sqlite)
- Add 11-table schema DDL migrations (000001_init.up.sql) based on DATA_TABLE.md
- Add seed data ingestion tool (cmd/seed) and static TypeScript content exporter (cmd/export-content)
- Add configuration loader (internal/config) supporting environment variables and .env files (HOST, PORT, DB_PATH, GIN_MODE, CORS_ALLOW_ORIGINS, AUTO_MIGRATE)
- Add lightweight multi-stage Dockerfile and docker-compose.yml with persistent SQLite volume
- Add comprehensive architecture specification (ARCHITECTURE.md) and REST API interface specification (API_INTERFACE.md)
- Harmonize frontend publications page to consume isHighlight flag from database-synced content

backend/internal/repository/members.go

@@ -0,0 +1,69 @@
+package repository
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+
+	"git.godopu.com/lab/landing_page/backend/internal/models"
+)
+
+type MembersRepository struct {
+	db *sql.DB
+}
+
+func NewMembersRepository(db *sql.DB) *MembersRepository {
+	return &MembersRepository{db: db}
+}
+
+func (r *MembersRepository) GetMembers(ctx context.Context) ([]models.Member, error) {
+	query := `
+		SELECT id, name_ko, name_en, degree, affiliation, email, is_advisor, display_order, created_at
+		FROM members
+		ORDER BY display_order ASC, id ASC
+	`
+	rows, err := r.db.QueryContext(ctx, query)
+	if err != nil {
+		return nil, fmt.Errorf("query members: %w", err)
+	}
+	defer rows.Close()
+
+	var members []models.Member
+	for rows.Next() {
+		var m models.Member
+		if err := rows.Scan(
+			&m.ID, &m.NameKo, &m.NameEn, &m.Degree,
+			&m.Affiliation, &m.Email, &m.IsAdvisor, &m.DisplayOrder, &m.CreatedAt,
+		); err != nil {
+			return nil, fmt.Errorf("scan member: %w", err)
+		}
+		members = append(members, m)
+	}
+	return members, rows.Err()
+}
+
+func (r *MembersRepository) GetAlumni(ctx context.Context) ([]models.Alumnus, error) {
+	query := `
+		SELECT id, name_ko, name_en, degree, graduated_at, major, current_position, created_at
+		FROM alumni
+		ORDER BY graduated_at DESC, id ASC
+	`
+	rows, err := r.db.QueryContext(ctx, query)
+	if err != nil {
+		return nil, fmt.Errorf("query alumni: %w", err)
+	}
+	defer rows.Close()
+
+	var alumni []models.Alumnus
+	for rows.Next() {
+		var a models.Alumnus
+		if err := rows.Scan(
+			&a.ID, &a.NameKo, &a.NameEn, &a.Degree,
+			&a.GraduatedAt, &a.Major, &a.CurrentPosition, &a.CreatedAt,
+		); err != nil {
+			return nil, fmt.Errorf("scan alumnus: %w", err)
+		}
+		alumni = append(alumni, a)
+	}
+	return alumni, rows.Err()
+}