Added mmonit/monit installation instruction for server monitoring

dd-code-api/README.md

 [[_TOC_]]
 
+## Installation dd-code server
+
 ### 1. Installation procedure
 
 1. delete any dd_venv folder  
@@ -57,6 +59,47 @@ Daily Backups should be enabled, and the backup data are located in ```/local/wi
 To develop REST API accessed to wiki.js, use the graphql playground.
 * http://ddcode-srv1:3000/graphql
 
+## Installation mmonit/monit for monitoring the server
+
+1. Install monit(agent) and mmonit(web server) from https://mmonit.com/monit/ and https://mmonit.com/download/ respectively
+
+2. Edit monit/conf/monitrc and copy ~/.monitrc to configure the communication with mmonit
+```bash
+  ## Check the apache server process
+  check process apache with pidfile /var/run/httpd/httpd.pid
+    if cpu > 60% for 2 cycles then alert
+    if cpu > 80% for 5 cycles then alert
+    if totalmem > 200.0 MB for 5 cycles then alert
+    if children > 250 then alert
+    if disk read > 500 kb/s for 10 cycles then alert
+    if disk write > 500 kb/s for 10 cycles then alert
+    if 3 restarts within 5 cycles then unmonitor
+    group server
+
+  ## Check the shiny server process
+  check process shiny with pidfile /var/run/shiny-server/shiny-server.pid
+    if cpu > 60% for 2 cycles then alert
+    if cpu > 80% for 5 cycles then alert
+    if totalmem > 2000.0 MB for 5 cycles then alert
+    if children > 250 then alert
+    if disk read > 500 kb/s for 10 cycles then alert
+    if disk write > 500 kb/s for 10 cycles then alert
+    if 3 restarts within 5 cycles then unmonitor
+    group server
+```
+   
+3. Edit mmonit/conf/server.xml to communicate with in the localhost
+```bash
+<Connector address="localhost" port="8080" processors="10" /> # For only local communication
+<Connector address="*" port="8080" processors="10" />         # For all users in public
+```
+
+4. Run mmonit and monit
+```bash
+mmonit start
+monit start
+```
+
 ## Make static condensate fields in protein collection
 
 ```shell