Fix build et actions

backend/Dockerfile

@@ -32,7 +32,7 @@ WORKDIR /app
 RUN pip install --no-cache-dir --upgrade pip setuptools wheel
 
 # Copy requirements
-COPY requirements.txt .
+COPY backend/requirements.txt .
 
 # Install Python dependencies in stages for better caching
 # Using versions compatible with Python 3.9
@@ -45,10 +45,11 @@ RUN pip install --no-cache-dir essentia-tensorflow
 RUN pip install --no-cache-dir -r requirements.txt
 
 # Copy application code
-COPY src/ ./src/
-COPY alembic.ini .
+COPY backend/src/ ./src/
+COPY backend/alembic.ini .
 
-COPY src/models/ ./models/
+# Copy Essentia models into image (28 MB total)
+COPY backend/models/ ./models/
 RUN ls -lh /app/models
 
 # Expose port