add supervisor

Author: akmamun

system/supervisor/frontend.MD

@@ -0,0 +1,68 @@
+# Install Supervisor and Manage Process
+
+## Installation
+``sh
+sudo apt-get install supervisor
+``
+## Goto /etc/supervisor/conf.d folder, supervisor create this folder in your system
+``sh
+cd /etc/supervisor/conf.d
+``
+## Make a file `touch filename.conf`,  make sure file name end with `.conf`
+- You may need permission to create a file or use every time prefix `sudo`
+- `sudo touch filename.conf`
+- If don't want use sudo give permission folder  
+- `sudo chmod -R 777 conf.d`
+
+## Add React App in Supervisor [frontend](frontend.conf)
+```sh
+[program:frontend]
+directory="project directory"
+command=npm start
+autostart = true
+autorestart=true 
+stderr_logfile=/var/log/test.err.log
+stdout_logfile=/var/log/test.out.log
+```
+- After write filename.conf file need following command for start
+- `sudo supervisorctl reread`
+- `sudo supervisorctl update`
+
+## Lets Check Supervisor Process
+- `sudo supervisorctl`
+
+## See Log of Supervisor Running Process 
+- `tail /var/log/test.err.log`
+- `tail /var/log/test.err.log`
+
+## Optionally, If More conf.d file write config file for run all of process
+```sh
+; supervisor config file
+[unix_http_server]
+file=/var/run/supervisor.sock   ; (the path to the socket file)
+chmod=0700                       ; sockef file mode (default 0700)
+
+[supervisord]
+logfile=/var/log/supervisor/supervisord.log ; (main log file;default $CWD/supervisord.log)
+pidfile=/var/run/supervisord.pid ; (supervisord pidfile;default supervisord.pid)
+childlogdir=/var/log/supervisor            ; ('AUTO' child log dir, default $TEMP)
+
+; the below section must remain in the config file for RPC
+; (supervisorctl/web interface) to work, additional interfaces may be
+; added by defining them in separate rpcinterface: sections
+[rpcinterface:supervisor]
+supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface
+
+[supervisorctl]
+serverurl=unix:///var/run/supervisor.sock ; use a unix:// URL  for a unix socket
+
+; The [include] section can just contain the "files" setting.  This
+; setting can list multiple files (separated by whitespace or
+; newlines).  It can also contain wildcards.  The filenames are
+; interpreted as relative to this file.  Included files *cannot*
+; include files themselves.
+
+[include]
+files = /etc/supervisor/conf.d/*.conf
+```
+## See [Supervisor](http://supervisord.org) for more details

system/supervisor/frontend.conf

@@ -1,6 +1,7 @@
-[program:test]
+[program:frontend]
 directory="project directory"
 command=npm start
+autostart = true
 autorestart=true 
 stderr_logfile=/var/log/test.err.log
 stdout_logfile=/var/log/test.out.log