Create monocker.md (#16)

* Create monocker.md

Added monocker to monitors

* Update monocker.md

apps/monitors/monocker.md

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+# Monocker
+
+Monocker monitors Docker (MONitors dOCKER) containers and alerts on 'state' change.
+There is no web ui or fancy dashboard.
+
+<br>
+
+- [Github repo](https://github.com/petersem/monocker)
+
+
+## docker-compose
+
+```yml
+---
+services:
+  monocker:
+    container_name: monocker
+    image: petersem/monocker
+    environment:
+      SERVER_LABEL: 'Dev'
+      MESSAGE_PLATFORM: 'telegram@your_bot_id@your_chat_id'
+      # MESSAGE_PLATFORM: 'pushbullet@your_api_key@your_device_id'
+      # MESSAGE_PLATFORM: 'pushover@your_user_key@your_app_api_token'
+      # MESSAGE_PLATFORM: 'discord@webhook_url'
+      LABEL_ENABLE: 'false'
+      ONLY_OFFLINE_STATES: 'false'
+      EXCLUDE_EXITED: 'false'
+      PERIOD: 60
+      DISABLE_STARTUP_MSG: 'false'
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock:ro
+    restart: unless-stopped
+```
+
+## Tips & tricks
+
+### raspberry pi and arm users
+
+There is only amd64 image available,  you have to build.
+
+`get clone https://github.com/petersem/monocker`
+
+
+Change `FROM node:14.17.3-alpine3.14` to `FROM node:latest` in the Dockerfile
+
+And  `docker build -t monocker .`
+
+Also change `image: petersem/monocker` to `image: monocker` in the docker-compose.yml
+
+### telegram notifications
+
+Contact @botfather,  create a bot and copy its token then start a chat with the bot and use the inline command @get_id_bot and copy the chat id