build(docker): don't copy docs

Author: TonyRL

.dockerignore

@@ -10,9 +10,9 @@ Procfile
 app-minimal
 assets
 coverage
-docs
 node_modules
 test
+website
 
 # files
 .codecov.yml
@@ -35,13 +35,13 @@ process.json
 package-lock.json
 vercel.json
 
-#git but keep the git commit hash
+# git but keep the git commit hash
 .git/logs
 .git/objects
 .git/index
 .git/info
 .git/hooks
 
-#rsshub auxiliary files
+# rsshub auxiliary files
 lib/radar-rules.js
 lib/v2/**/radar.js