Show alert timezone (#37)

Show alert timezone along with time.

Before:

![image](https://github.com/lyft/opsreview/assets/895548/efad48e0-849e-4bdd-8da7-bd4908768edd)

After:

![image](https://github.com/lyft/opsreview/assets/895548/ae75cbe7-491f-426d-b2e6-6c4a1a817eb4)

README.md

@@ -12,21 +12,21 @@ Using the opsreview tool, you can quickly compile a report on recent alerts for
 ```
 > python pull_alerts.py
 
-Time: Tuesday, January 19 - 9:19 AM
+Time: Tuesday, January 19 - 9:19 AM +0000
 Service: api
 Description: Failing API alarm: CRON failure
 URL: https://subdomain.pagerduty.com/incidents/ABC123
 Notes:
 ['[email protected]: #a - Re-ran CRON']
 
-Time: Tuesday, January 19 - 12:03 PM
+Time: Tuesday, January 19 - 12:03 PM +0000
 Service: api
 Description: Failing API alarm: CPU percent > 10
 URL: https://subdomain.pagerduty.com/incidents/ABC124
 Notes:
 ['[email protected]: #na - Temporary spike in CPU, no action taken. Alert is too sensitive.']
 
-Time: Tuesday, January 19 - 1:35 PM
+Time: Tuesday, January 19 - 1:35 PM +0000
 Service: www
 Description: Failing WWW alarm: 5XX percent > 5
 URL: https://subdomain.pagerduty.com/incidents/ABC125
@@ -57,3 +57,9 @@ Run the script.
 ```bash
 python pull_alerts.py
 ```
+
+## Timezone
+By default, local timezone is used to print alert time. To change default timezone use `TZ` environment variable:
+```bash
+TZ=UTC python pull_alerts.py
+```

pull_alerts.py

@@ -36,7 +36,7 @@
 class FormattedIncident(object):
     def pretty_output(self):
         return u'Time: {}\nService: {}\nDescription: {}\nURL: {}\nNotes:\n{}\n'.format(
-            self.created_on.strftime('%A, %B %-d - %-I:%M %p'),
+            self.created_on.strftime('%A, %B %-d - %-I:%M %p %z'),
             self.service,
             self.description,
             self.url,