chore: initial project structure

.gitignore

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+# Binaries
+*.exe
+*.dll
+*.so
+*.dylib
+*.test
+*.out
+
+# Go
+vendor/
+go.sum
+
+# IDE
+.idea/
+.vscode/
+*.swp
+*.swo
+
+# OS
+.DS_Store
+Thumbs.db

README.md

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+# MrixsCraft Server
+
+Minecraft серверная часть на Go (net/http + PostgreSQL).
+
+## Сборка
+
+```bash
+go build -o mrixscraft-server ./cmd/server
+```
+
+## Запуск
+
+```bash
+export SERVER_PORT=8080
+export DATABASE_URL="postgres://user:pass@localhost:5432/mrixscraft"
+
+go run ./cmd/server
+```
+
+## Переменные окружения
+
+| Переменная | Описание | По умолчанию |
+|------------|----------|--------------|
+| `SERVER_PORT` | Порт HTTP-сервера | `8080` |
+| `DATABASE_URL` | DSN PostgreSQL | — |

cmd/server/main.go

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+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+)
+
+func main() {
+	port := os.Getenv("SERVER_PORT")
+	if port == "" {
+		port = "8080"
+	}
+
+	mux := http.NewServeMux()
+	mux.HandleFunc("/health", func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusOK)
+		fmt.Fprintln(w, "ok")
+	})
+
+	log.Printf("MrixsCraft Server starting on :%s", port)
+	if err := http.ListenAndServe(":"+port, mux); err != nil {
+		log.Fatal(err)
+	}
+}

go.mod

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+module github.com/Mrixs/MrixsCraft-server
+
+go 1.22

internal/admin/admin.go

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+// package admin implements admin panel endpoints (modpack management, CI/CD release).
+package admin

internal/api/api.go

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+// Package api implements public HTTP endpoints for the launcher and website.
+package api
+

internal/auth/auth.go

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+// Package auth implements Yggdrasil authentication protocol.
+package auth

internal/cas/cas.go

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+// package cas implements Content-Addressable Storage for files (mods, assets, etc).
+package cas

internal/config/config.go

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+// package config handles server configuration (env vars, config files).
+package config

internal/database/database.go

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+// package database manages PostgreSQL connections, migrations, and data models.
+package database

internal/middleware/middleware.go

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+// package middleware provides HTTP middleware (JWT, CORS, rate limiting, logging).
+package middleware

internal/templates/templates.go

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+// package templates handles Go html/template rendering for the site and admin panel.
+package templates

pkg/utils/utils.go

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+// package utils provides shared utility functions (SHA-1, ZIP, etc.).
+package utils