feat: Override config with secrets file

.gitignore

@@ -44,3 +44,5 @@ npm-debug.log
 icd10_vector_tensors.bin
 
 .elixir-tools/
+
+config/*.secret.exs

config/dev.exs

@@ -80,3 +80,8 @@ config :phoenix_live_view, :debug_heex_annotations, true
 
 # Disable swoosh api client as it is only required for production adapters.
 config :swoosh, :api_client, false
+
+# Optional custom config file: config/dev.secret.exs
+if File.exists?("./config/#{config_env()}.secret.exs") do
+  import_config "#{config_env()}.secret.exs"
+end