Add cron running and start script

This commit adds a new property to the instance config which allows a
cron schedule to be specified for the script.

It also moves the encryption key under which user emails are stored into
something that is pasted in when the app starts.

- Add cron_restart property to ecosystem.config.js.template
- Remove KEY property from app environment in
ecosystem.config.js.template
- Create start.sh, a script that accepts arguments containing the
instance name and environment, then prompts the user to paste the
encryption key, then starts the app, passing the key into the app's
environment.

ecosystem.config.js.template

@@ -4,15 +4,15 @@ module.exports = {
             name: '<instance_name>-email',
             script: 'index.js',
             instances: 1,
-            autorestart: true,
-            watch: true,
+            autorestart: false,
+            watch: false,
+            cron_restart: "*/15 * * * *",
             max_memory_restart: '1G',
             env: {
                 NODE_ENV: 'development',
                 PGUSER: '<db_user>',
                 PGPASSWORD: '<db_password>',
                 SCHEMA: '<db_user>',
-                KEY: '<encryption_key_must_match_ems-api>',
                 BASE_URL: '<base_url_of_frontend>'
                 EMAIL_FROM: '<email_from_address>',
                 // See https://nodemailer.com/smtp/ for all options
@@ -26,7 +26,6 @@ module.exports = {
                 PGUSER: '<db_user>',
                 PGPASSWORD: '<db_password>',
                 SCHEMA: '<db_user>',
-                KEY: '<encryption_key_must_match_ems-api>',
                 BASE_URL: '<base_url_of_frontend>'
                 EMAIL_FROM: '<email_from_address>',
                 // See https://nodemailer.com/smtp/ for all options

start.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+
+while getopts ":i:e:" opt; do
+  case $opt in
+    i) instance="$OPTARG"
+    ;;
+    e) env="$OPTARG"
+    ;;
+    \?) echo "Invalid option -$OPTARG" >&2
+    exit
+    ;;
+  esac
+done
+
+INST_LEN=$(echo -n $instance | wc -m)
+ENV_LEN=$(echo -n $env | wc -m)
+
+if [[ $INST_LEN == 0 || $ENV_LEN == 0 ]]
+then
+  echo "Invalid parameters passed, must pass -i <instance_name> -e <environment>"
+  exit
+fi
+
+echo Paste key, then press enter
+
+read key
+
+KEY_LEN=$(echo -n $key | wc -m)
+
+if [[ $KEY_LEN = 0 ]]
+then
+  echo "Invalid key passed"
+fi
+
+KEY=$key pm2 start --only $instance --env $env