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+The following variables can be used in the `environment` section of your `docker-compose` file:
+
+| Attribute| Default | Description  |
+|--|--|--|
+| APP_KEY | - | Used for internal encryption - must be set, see [Installation](Installation) |
+| APP_TIMEZONE | UTC | Timezone of the application |
+| APP_URL | http://localhost | Web URL to clrghouz |
+| AWS_ACCESS_KEY_ID | [not defined] | S3 Access key to store/retrieve files |
+| AWS_SECRET_ACCESS_KEY | [not defined] | S3 Secret key to store/retrieve files |
+| AWS_ENDPOINT | http://minio:9000 | URL to S3 Server |
+| AWS_BUCKET | clrghouz | S3 Bucket to save files in |
+| DB_DATABASE | clrghouz | Database name used to store data |
+| DB_PASSWORD | [not defined] | Database password |
+| DB_USERNAME | clrghouz | Database username |
+| FIDO_DNS_NS | [not defined] | NS record returned for DNS queries |
+| FIDO_DEFAULT_PACKET | 2+ | Packet to use for systems, when a packet format hasnt been selected |
+| FIDO_HAPROXY | FALSE | Use the HAPROXY protocol, useful to get the true clients IP address |
+| FIDO_PACKET_KEEP | FALSE | Dont delete incoming packets and tic files after successful processing |
+| FIDO_QUEUE_MSGS | 50 | Number of messages in packet to force it to be sent to the queue for processing |
+| FIDO_QUEUE_SIZE | 1000000 | Size in bytes of incoming mail to force to be sent to the queue for processing |
+| LOG_LEVEL | info | Logging mode, options are: DEBUG, INFO, NOTICE, WARNING, ERROR, CRITICAL, ALERT |
+| MAIL_FROM_ADDRESS | [not defined] | From address used in any system generated outgoing email |
+| MAIL_FROM_NAME | [not defined] | From name used in any system generated outgoing email |
+| MEMCACHED_START | FALSE | Start internal memcached server |
+| ZEROTIER_START | FALSE | Start ZeroTier VPN |
+