matrix password can be an env var

src/config.rs

@@ -11,6 +11,7 @@ pub(crate) struct Config {
 #[derive(serde::Deserialize, Debug)]
 pub(crate) struct MatrixConfig {
     pub(crate) username: String,
+    #[serde(default = "get_matrix_password")]
     pub(crate) password: String,
     #[serde(default = "get_device_name")]
     pub(crate) device_name: String,
@@ -30,6 +31,13 @@ fn get_db_uri() -> String {
     "sqlite://matrix-meshtastic-bridge.db".to_string()
 }
 
+fn get_matrix_password() -> String {
+    match std::env::var("MATRIX_PASSWORD") {
+        Ok(p) => p,
+        Err(_) => "".to_string(),
+    }
+}
+
 pub(crate) async fn read_config() -> Config {
     let filename = match std::env::var("CONFIG_PATH") {
         Ok(value) => value,