Keep root lint checks out of desktop/

ESLint picks up desktop's own config for its files, which only works
with desktop's dependencies installed. Desktop is linted by its own
`scripts/check-js`.

.dockerignore

@@ -11,3 +11,5 @@ radicle-httpd/target
 radicle-search/target
 target
 .wrangler
+# The desktop app, with its own node_modules and target, isn't part of these images.
+desktop

.prettierignore

@@ -1 +1,2 @@
 radicle-httpd
+desktop

scripts/check

@@ -8,5 +8,7 @@ npx svelte-check --tsconfig tsconfig.json --config ./vite.config.ts --fail-on-wa
 # CI can then carry them between builds. They share one directory because a
 # Buildkite cache path is always a directory, never a file.
 mkdir -p .lintcache
-npx eslint --cache --cache-location .lintcache/eslint --cache-strategy content --max-warnings 0 .
+# desktop/ has its own eslint config, which eslint would otherwise pick up for
+# its files. It is linted by desktop/scripts/check-js.
+npx eslint --cache --cache-location .lintcache/eslint --cache-strategy content --max-warnings 0 --ignore-pattern desktop/ .
 npx prettier "**/*.@(ts|js|svelte|json|css|html|yml)" --ignore-path .gitignore --ignore-path .prettierignore --check --cache --cache-location .lintcache/prettier