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Update README.md fixes #11

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Text provided by @WilliamTheMarsman, thanks.
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PauRE
2019-03-07 15:32:12 +01:00
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@@ -47,6 +47,23 @@ services:
```
### Environment Variables
Most variables are the same as [postgres official image](https://hub.docker.com/_/postgres/).
| env variable | description |
|--|--|
| POSTGRES_HOST | postgres connection parameter; postgres host. |
| POSTGRES_DB | postgres connection parameter; postgres database to connect to. |
| POSTGRES_USER | postgres connection parameter; postgres user to connect with. |
| POSTGRES_PASSWORD | postgres connection parameter; postgres password to connect with. |
| POSTGRES_PASSWORD_FILE | alternative to POSTGRES_PASSWORD, to use with docker secrets. |
| POSTGRES_EXTRA_OPTS | additional options to supply `pg_dump` when creating back-ups. |
| SCHEDULE | [cron-schedule](http://godoc.org/github.com/robfig/cron#hdr-Predefined_schedules) specifying the interval between taking postgres backups. |
| BACKUP_KEEP_DAYS | number of days to keep backups before removing. |
| BACKUP_KEEP_WEEKS | number of weeks to keep backups before removing. |
| BACKUP_KEEP_MONTHS | number of months to keep backups before removing. |
| HEALTHCHECK_PORT | Port listening for cron-schedule health check. |
### Manual Backups
By default it makes daily backups but you can start a manual one by running the command `/backup.sh`.