diff --git a/README.md b/README.md
index 1433772..58a7108 100644
--- a/README.md
+++ b/README.md
@@ -12,27 +12,55 @@ The bot is designed to run within a Kubernetes environment, but can be operated
 
 ## Configuration
 
-All configuration is provided via environment variables
+SMSBot can be configured using either a configuration file or environment variables. Environment variables will override any values set in the configuration file.
 
-| Variable                   | Required? | Description                                                                 |
-| -------------------------- | --------- | --------------------------------------------------------------------------- |
-| SMSBOT_DEFAULT_SUBSCRIBERS | No        | A list of IDs, seperated by commas, to add to the subscribers list on start |
-| SMSBOT_LISTEN_HOST         | No        | The host for the webhooks to listen on, defaults to `0.0.0.0`               |
-| SMSBOT_LISTEN_PORT         | No        | The port to listen to, defaults to `80`                                     |
-| SMSBOT_OWNER_ID            | No        | ID of the owner of this bot                                                 |
-| SMSBOT_TELEGRAM_BOT_TOKEN  | Yes       | Your Bot Token for Telegram                                                 |
-| SMSBOT_TWILIO_AUTH_TOKEN   | No        | Twilio auth token, used to validate any incoming webhook calls              |
+### Configuration File
+
+Create a configuration file (e.g., `config.ini`) based on the provided `config-example.ini`:
+
+```ini
+[logging]
+level = INFO
+
+[webhook]
+host = 127.0.0.1
+port = 80
+
+[telegram]
+owner_id = OWNER_USER_ID
+bot_token = BOT_TOKEN
+
+[twilio]
+account_sid = TWILIO_ACCOUNT_SID
+auth_token = TWILIO_AUTH_TOKEN
+```
+
+### Environment Variables
+
+All configuration options can be overridden using environment variables:
+
+| Environment Variable        | Config Section | Config Key  | Required? | Description                                                                 |
+| --------------------------- | -------------- | ----------- | --------- | --------------------------------------------------------------------------- |
+| SMSBOT_LOGGING_LEVEL        | logging        | level       | No        | The log level to output to the console, defaults to `INFO`                  |
+| SMSBOT_TELEGRAM_BOT_TOKEN   | telegram       | bot_token   | Yes       | Your Bot Token for Telegram                                                 |
+| SMSBOT_TELEGRAM_OWNER_ID    | telegram       | owner_id    | No        | ID of the owner of this bot                                                 |
+| SMSBOT_TELEGRAM_SUBSCRIBERS | telegram       | subscribers | No        | A list of IDs, separated by commas, to add to the subscribers list on start |
+| SMSBOT_TWILIO_ACCOUNT_SID   | twilio         | account_sid | No        | Twilio account SID                                                          |
+| SMSBOT_TWILIO_AUTH_TOKEN    | twilio         | auth_token  | No        | Twilio auth token, used to validate any incoming webhook calls              |
+| SMSBOT_WEBHOOK_HOST         | webhook        | host        | No        | The host for the webhooks to listen on, defaults to `127.0.0.1`             |
+| SMSBOT_WEBHOOK_PORT         | webhook        | port        | No        | The port to listen to, defaults to `80`                                     |
 
 ## Setup
 
 To configure SMSBot, you'll need a Twilio account, either paid or trial is fine.
 
-* Setup a number in the location you want.
-* Under Phone Numbers -> Manage -> Active Numbers, click the number you want to setup.
-* In the "Voice & Fax" section, update the "A Call Comes In" to the URL of your SMSBot instance, with the endpoint being `/call`, e.g. `http://mymachine.test.com/call`
-* In the "Messaging" section, update the "A Message Comes In" to the URL of your SMSBot instance, with the endpoint being `/message`, e.g. `http://mymachine.test.com/message`
+1. Copy `config-example.ini` to `config.ini` and update the values, or set the appropriate environment variables.
+2. Setup a number in the location you want.
+3. Under Phone Numbers -> Manage -> Active Numbers, click the number you want to setup.
+4. In the "Voice & Fax" section, update the "A Call Comes In" to the URL of your SMSBot instance, with the endpoint being `/call`, e.g. `http://mymachine.test.com/call`
+5. In the "Messaging" section, update the "A Message Comes In" to the URL of your SMSBot instance, with the endpoint being `/message`, e.g. `http://mymachine.test.com/message`
 
-Your bot should now receive messages, on Telegram you need to start a chat or invite it into any channels you want, then update the `SMSBOT_DEFAULT_SUBSCRIBERS` values with their IDs.
+Your bot should now receive messages, on Telegram you need to start a chat or invite it into any channels you want, then update the `SMSBOT_TELEGRAM_SUBSCRIBERS` values with their IDs.
 
 **Note**: You cannot send test messages from your Twilio account to your Twilio numbers, they'll be silently dropped or fail with an "Invalid Number" error.
 
diff --git a/config-example.ini b/config-example.ini
index ef2ef9f..9ea19aa 100644
--- a/config-example.ini
+++ b/config-example.ini
@@ -7,6 +7,7 @@ port = 80
 
 [telegram]
 owner_id = OWNER_USER_ID
+subscribers = 1111,2222,3333
 bot_token = BOT_TOKEN
 
 [twilio]
diff --git a/pyproject.toml b/pyproject.toml
index 244727f..1825228 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -30,3 +30,6 @@ dev = [
     "ruff>=0.12.9",
 ]
 github = ["pytest-github-actions-annotate-failures>=0.3.0"]
+
+[tool.ruff]
+line-length = 120