Add python-multipart to dependencies in Dockerfile

Dockerfile

@@ -15,7 +15,7 @@ COPY requirements.txt .
 ENV HF_HOME="/tmp/lexalyze-cache"
 
 # Install Python dependencies
-RUN pip install --no-cache-dir -r requirements.txt
+RUN pip install --no-cache-dir -r requirements.txt python-multipart
 RUN mkdir -m 777 /tmp/lexalyze-cache
 RUN chmod 777 /app
 RUN mkdir -m 777 /nltk_data