tweak buildruntime input dir & clarify build script

Dockerfile.buildruntime

@@ -9,7 +9,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     && rm -rf /var/lib/apt/lists/*
 
 # Bind readonly & copy files in to avoid modifying host files
-WORKDIR /usr/src/kinode
+WORKDIR /input
 
 # Set the default command to run the build script
 # TODO: once build is idempotent, remove the `rm -rf` line

scripts/build-release.py

@@ -48,7 +48,6 @@ def build_and_move(feature, tmp_dir, architecture, os_name):
     zip_path = os.path.join(tmp_dir, zip_name)
     with zipfile.ZipFile(zip_path, 'w', zipfile.ZIP_DEFLATED) as zipf:
         zipf.write(dest_path, os.path.basename(dest_path))
-    os.chmod(zip_path, 0o664)
 
     # Remove the original binary
     os.remove(dest_path)