add configs: nginx, supervisor, gunicorn

docs/examples/nginx_gunicorn/gunicorn_start

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+#!/bin/bash
+
+export MPLCONFIGDIR="/srv/nsupdate/run/"
+ 
+NAME="nsupdate.info"                               # Name of the application
+DJANGODIR=/srv/nsupdate/nsupdate/nsupdate          # Django project directory
+SOCKFILE=/srv/nsupdate/run/gunicorn.sock           # communication socket
+PIDFILE=/srv/nsupdate/run/gunicorn.pid
+USER=www-data                                      # the user to run as
+GROUP=www-data                                     # the group to run as
+NUM_WORKERS=3                                      # how many worker processes should Gunicorn spawn
+DJANGO_SETTINGS_MODULE=nsupdate.settings           # which settings file should Django use
+DJANGO_WSGI_MODULE=nsupdate.wsgi                   # WSGI module name
+ 
+echo "Starting $NAME"
+ 
+# Activate the virtual environment
+cd $DJANGODIR
+source /srv/nsupdate/bin/activate
+export DJANGO_SETTINGS_MODULE=$DJANGO_SETTINGS_MODULE
+export PYTHONPATH=$DJANGODIR:$PYTHONPATH
+ 
+# Create the run directory if it doesn't exist
+RUNDIR=$(dirname $SOCKFILE)
+test -d $RUNDIR || mkdir -p $RUNDIR
+ 
+# Start your Django Unicorn
+# Programs meant to be run under supervisor should not daemonize themselves (do not use --daemon)
+exec /srv/nsupdate/bin/gunicorn ${DJANGO_WSGI_MODULE}:application \
+  --name $NAME \
+  --workers $NUM_WORKERS \
+  --user=$USER --group=$GROUP \
+  --log-level=debug \
+  --bind=unix:$SOCKFILE \
+  --pid $PIDFILE
+

docs/examples/nginx_gunicorn/nginx.conf

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+upstream nsupdate_server {
+  server unix:/srv/nsupdate/run/gunicorn.sock fail_timeout=0;
+}
+
+server {
+    listen       :80;
+    server_name  nsupdate.info;
+    return       301 http://www.nsupdate.info$request_uri;
+}
+
+server {
+
+    listen :80;
+    listen [::]:80;
+    server_name nsupdate.info ipv4.nsupdate.info ipv6.nsupdate.info;
+    server_tokens off;
+
+    client_max_body_size 4G;
+
+    access_log /srv/nsupdate/logs/nginx-access.log;
+    error_log /srv/nsupdate/logs/nginx-error.log;
+
+    location /favicon.png {
+        alias   /srv/nsupdate/static/favicon.png;
+    }
+
+    location /static/ {
+        alias   /srv/nsupdate/static/;
+    }
+
+    location / {
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        # when doing https
+        # proxy_set_header X-Forwarded-Proto https;
+        proxy_set_header Host $http_host;
+        proxy_redirect off;
+
+        if (!-f $request_filename) {
+            proxy_pass http://nsupdate_server;
+            break;
+        }
+    }
+
+    # Error pages
+    error_page 500 502 503 504 /500.html;
+    location = /500.html {
+        root /srv/nsupdate/static/;
+    }
+}

docs/examples/nginx_gunicorn/supervisor.conf

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+[program:nsupdate.info]
+command = /srv/nsupdate/bin/gunicorn_start  ; Command to start app
+user = www-data                             ; User to run as
+stdout_logfile = /srv/nsupdate/logs/gunicorn_supervisor.log  ; Where to write log messages
+redirect_stderr = true                      ; Save stderr in the same log