Added checkMK monitoring tool (#6)

* Added checkMK monitoring tool

* Added missing file :)

Co-authored-by: David Schmidt <david.schmidt@virtamed.com>

apps/monitors/checkmk.md

@@ -0,0 +1,40 @@
+# CheckMK
+
+- Pretty complete solution for whole infrastructure monitoring
+- Based on Nagios 
+
+<br>
+
+- [Homepage](https://checkmk.com/)
+- [Github repo](https://github.com/tribe29/checkMK)
+- [DockerHub repo](https://hub.docker.com/r/checkmk/check-mk-raw)
+
+
+## docker-compose.yml
+```yml
+---
+version: '3.6'
+
+services:
+  checkmk:
+    container_name: checkmk
+    image: checkmk/check-mk-raw
+    tmpfs:
+      - /opt/omd/sites/cmk/tmp:uid=1000,gid=1000
+    ulimits:
+      nofile: 1024
+    volumes:
+      - ./monitoring:/omd/sites
+      - /etc/localtime:/etc/localtime:ro
+    ports:
+      - "8080:5000"
+    restart: unless-stopped
+    networks:
+      checkmk_network:
+
+networks:
+    checkmk_network:
+```
+
+- and go to http://localhost:8080/cmk/check_mk/
+- You will find the provisional password for the cmkadmin account in the logs that are written for this container