Add redis to .env.sample fixes #1340 (#1526)

* Add redis to .env.sample fixes #1340

* Disable json logging by default

.env.sample

@@ -1,43 +1,36 @@
-DEBUG=False
-HOSTNAME=localhost
-OPENIDC_HEADER=HTTP_X_FORWARDED_USER
-SENTRY_DSN=
-SECRET_KEY=SOMETHINGSECURE
-DB_NAME=postgres
-DB_USER=postgres
-DB_PASS=postgres
+BUGZILLA_API_KEY=
+BUGZILLA_CC_LIST=
+BUGZILLA_HOST=
 DB_HOST=db
-REDIS_HOST=
-REDIS_PORT=
-REDIS_DB=
+DB_NAME=postgres
+DB_PASS=postgres
+DB_USER=postgres
+DEBUG=True
+DELIVERY_CONSOLE_HOST=
+EMAIL_BACKEND=django.core.mail.backends.console.EmailBackend
+EMAIL_HOST=
+EMAIL_HOST_PASSWORD=
+EMAIL_HOST_USER=
+EMAIL_PORT=
+EMAIL_RELEASE_DRIVERS=
+EMAIL_REVIEW=
+EMAIL_SENDER=
+EMAIL_SHIP=
+EXPERIMENTS_PAGINATE_BY=50
+HOSTNAME=localhost
+LOGGING_CONSOLE_LEVEL=INFO
+LOGGING_USE_JSON=False
+NORMANDY_API_HOST=
+OPENIDC_CLIENT_ID=
+OPENIDC_CLIENT_SECRET=
+OPENIDC_HEADER=HTTP_X_FORWARDED_USER
+REDIS_DB=0
+REDIS_HOST=redis
+REDIS_PORT=6379
+SECRET_KEY=SOMETHINGSECURE
+SENTRY_DSN=
 STATSD_BACKEND=markus.backends.logging.LoggingMetrics
 STATSD_HOST=
 STATSD_PORT=
 STATSD_PREFIX=experimenter
-OPENIDC_CLIENT_ID=
-OPENIDC_CLIENT_SECRET=
-EMAIL_RELEASE_DRIVERS=
-EMAIL_REVIEW=
-EMAIL_SHIP=
-EMAIL_SENDER=
-EMAIL_HOST=smtp
-EMAIL_PORT=25
-EMAIL_HOST_USER=
-EMAIL_HOST_PASSWORD=
-BUGZILLA_HOST=
-BUGZILLA_API_KEY=
-BUGZILLA_CC_LIST=
-EXPERIMENTS_PAGINATE_BY=50
-# This will enable or disable the Google Analytics script tag in the
-# base template.
 USE_GOOGLE_ANALYTICS=false
-
-# Enables the mozlog JSON format for console logging.
-LOGGING_USE_JSON=True
-# This will print all sent emails to stdout without requiring a server.
-EMAIL_BACKEND=django.core.mail.backends.console.EmailBackend
-# Controls what filter level to apply to logging for the console
-# handler.
-LOGGING_CONSOLE_LEVEL=INFO
-DELIVERY_CONSOLE_HOST=
-NORMANDY_API_HOST=