Add --prerelease=allow to uv pip install in Dockerfile

The --prerelease=allow flag is added to the uv pip install command to support dependencies on pre-release packages, specifically required for openhands-ai.

Dockerfile

@@ -23,7 +23,8 @@ COPY requirements.txt .
 
 # Install Python dependencies with uv
 # Using --system to install into the system Python (not a venv)
-RUN uv pip install --system --no-cache -r requirements.txt
+# --prerelease=allow is needed for openhands-ai which depends on pre-release packages
+RUN uv pip install --system --no-cache --prerelease=allow -r requirements.txt
 
 # Copy application code
 COPY . .