Fix rego-tunnel docker-compose.json format and add build folder

- Convert environment from array to object format (runtipi requirement)
- Remove hardcoded KEY from docker-compose.json
- Add build folder with custom Dockerfile and rego scripts

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/rego-tunnel/build/.devcontainer/140 - Windows Server 2016/devcontainer.json

@@ -0,0 +1,19 @@
+{
+  "name": "Windows Server 2016",
+  "service": "windows",
+  "containerEnv": {
+    "VERSION": "2016"
+  },
+  "forwardPorts": [8006],
+  "portsAttributes": {
+    "8006": {
+      "label": "Web",
+      "onAutoForward": "notify"
+    }
+  },
+  "otherPortsAttributes": {
+    "onAutoForward": "ignore"
+  }, 
+  "dockerComposeFile": "../codespaces.yml",
+  "initializeCommand": "docker system prune --all --force"
+}