diff --git a/.dockerignore b/.dockerignore
index 8790b32..c30b4f7 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -66,3 +66,7 @@
 .gitignore
 /bin
 /data
+
+# Local config files, kept out of git because they can hold the signing key.
+**/config.yaml
+**/config.dev.yml
diff --git a/TODO.md b/TODO.md
index 2a34c53..802565f 100644
--- a/TODO.md
+++ b/TODO.md
@@ -31,6 +31,12 @@ P2: security: per-IP rate limiting on the image routes
 
 # Completed Steps
 
+- 2026-10-04 local config files stay out of the Docker build context (closes
+  #211): `.dockerignore` now leaves out `config.yaml` and `config.dev.yml` in
+  every directory, the local config files `.gitignore` keeps out of git because
+  they can hold the signing key. `configs/config.example.yml` is still sent.
+  `config.yml`, which Getting Started creates, is in neither file:
+  https://git.eeqj.de/sneak/pixa/issues/212.
 - 2026-10-04 `.dockerignore` keeps secrets out at every depth (closes #205): the
   file is now the standard one from `sneak/prompts`, whose patterns match in
   every directory and, for environment files and private keys, in any letter