Add application file

Dockerfile

@@ -43,7 +43,9 @@ ENV MPLCONFIGDIR=/app/tmp/mpl_config
 
 # Copy requirements and install Python dependencies
 COPY requirements.txt .
-RUN pip install --no-cache-dir -r requirements.txt
+RUN pip install --upgrade pip && \
+    pip install --no-cache-dir --no-user -r requirements.txt
+
 
 # Copy FastAPI app source code
 COPY app.py .