Update Dockerfile

Dockerfile

@@ -2,14 +2,19 @@ FROM python:3.12-slim
 
 # Install pip + Gradio dependencies
 RUN apt-get update && apt-get install -y \
-    swig g++ cmake make \
-    libglib2.0-0 libxml2 libzip4 libcurl4 \
+    swig \
+    g++ \
+    cmake \
+    make \
+    libglib2.0-dev \
+    libxml2-dev \
+    libzip-dev \
+    libcurl4-openssl-dev \
     && rm -rf /var/lib/apt/lists/*
-
 # Install Python packages
 RUN pip install --upgrade pip
 RUN pip install verovio
-RUN python3 -c "import verovio; print('Verovio installed:', verovio.toolkit().getVersion())"
+RUN python3 -c "import verovio, sys; sys.stderr.write('✅ Verovio version: ' + verovio.toolkit().getVersion() + '\n')"
 RUN pip install gradio
 
 # Copy app and MEI file