diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 0000000..6d20fc4
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,14 @@
+# Pre-commit hooks for ADS-Bit.
+#
+# Setup (once):
+#   pip install pre-commit
+#   pre-commit install
+#
+# Thereafter gitleaks scans every commit for secrets (tokens, keys,
+# password hashes) before they can reach gitea or the public GitHub mirror.
+# Run manually across the whole tree with:  pre-commit run --all-files
+repos:
+  - repo: https://github.com/gitleaks/gitleaks
+    rev: v8.18.4
+    hooks:
+      - id: gitleaks
diff --git a/README.md b/README.md
index af493a9..6f73f50 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ A retro SNES-style side-view flight tracker that displays ADS-B aircraft data wi
 
 ### Live viewer
 
-Real-time ADS-B traffic rendered as pixel-art sprites over a directional background — here the East view, with the Las Vegas skyline on the horizon. Aircraft are labelled with callsign, altitude, and distance, and listed in the sidebar sorted by range.
+Real-time ADS-B traffic rendered as pixel-art sprites over a directional background — here the East view, with a desert skyline on the horizon. Aircraft are labelled with callsign, altitude, and distance, and listed in the sidebar sorted by range.
 
 ![Live viewer with aircraft in view](screenshots/viewer.png)
 
@@ -136,8 +136,8 @@ ADS-Bit uses a first-run setup wizard to configure your installation. You can al
   "receiver_port": 30003,
   "location": {
     "name": "My Location",
-    "lat": 36.2788,
-    "lon": -115.2283
+    "lat": 0.0,
+    "lon": 0.0
   },
   "web_port": 2001,
   "theme": "desert"
diff --git a/screenshots/viewer.png b/screenshots/viewer.png
index 962bd0d..54c2718 100644
Binary files a/screenshots/viewer.png and b/screenshots/viewer.png differ