Initial commit — status checker service

Polls Nginx Proxy Manager API for proxy hosts matching configurable
domain patterns (NPM_INCLUDE_PATTERNS), HTTP-checks each every 60s,
serves results as JSON (/api/status) and a terminal-aesthetic HTML
page (/). Port 3035.

NPM connection and domain filter patterns are fully configurable via
environment variables — see README and .env.example.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docker-compose.yml

@@ -0,0 +1,11 @@
+services:
+  app:
+    image: ${IMAGE}
+    restart: unless-stopped
+    ports:
+      - "${PORT:-3035}:3035"
+    environment:
+      - NPM_BASE_URL=${NPM_BASE_URL}
+      - NPM_EMAIL=${NPM_EMAIL}
+      - NPM_SECRET=${NPM_SECRET}
+      - NPM_INCLUDE_PATTERNS=${NPM_INCLUDE_PATTERNS}