Clean repository: organized structure and GitOps setup

- Organized root directory structure
- Moved orphan files to proper locations
- Updated .gitignore to ignore temporary files
- Set up Gitea Runner for GitOps automation
- Fixed Tailscale access issues
- Added workflow for automated Nomad deployment

infrastructure/opentofu/providers/digitalocean/main.tf

@@ -0,0 +1,25 @@
+# DigitalOcean Provider 配置
+
+terraform {
+  required_providers {
+    digitalocean = {
+      source  = "digitalocean/digitalocean"
+      version = "~> 2.0"
+    }
+  }
+}
+
+# DigitalOcean 提供者配置
+provider "digitalocean" {
+  token = var.do_config.token
+}
+
+# 创建 DigitalOcean Droplet 示例
+resource "digitalocean_droplet" "web" {
+  image  = "ubuntu-22-04-x64"
+  name   = "web-1"
+  region = var.do_config.region
+  size   = "s-1vcpu-1gb"
+  
+  tags = ["web", "mgmt"]
+}