Environment variables can now be used directly inside the config instead of requiring special handling

Cargo.lock

@@ -2,6 +2,15 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "aho-corasick"
+version = "0.7.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cc936419f96fa211c1b9166887b38e5e40b19958e5b895be7c1f93adec7071ac"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "anyhow"
 version = "1.0.68"
@@ -37,6 +46,7 @@ dependencies = [
  "impl_cast",
  "paste",
  "pollster",
+ "regex",
  "reqwest",
  "rumqttc",
  "serde",
@@ -784,6 +794,8 @@ version = "1.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e076559ef8e241f2ae3479e36f97bd5741c0330689e217ad51ce2c76808b868a"
 dependencies = [
+ "aho-corasick",
+ "memchr",
  "regex-syntax",
 ]