Exclude Electron files from web image

Dockerfile

@@ -47,6 +47,12 @@ RUN test -n "$VITE_HCAPTCHA_SITEKEY" \
 
 RUN npm run build
 
+# Electron entry points are not part of the web deployment.
+RUN rm -f \
+    build/electron-config.json \
+    build/electron.js \
+    build/preload.js
+
 FROM nginx:alpine AS runtime
 
 COPY nginx/default.conf /etc/nginx/conf.d/default.conf

README.md

@@ -55,6 +55,9 @@ The build also replaces the hard-coded external login avatar with the bundled
 `/logo.png` file. If upstream removes the known avatar URL, the build skips this
 step.
 
+The runtime image does not include the upstream Electron entry points and
+configuration. These files are not used by the web deployment.
+
 ## Start the deployment
 
 ```bash