Fix typo in Dockerfile by correcting directory.py to dictionary.py

Dockerfile

@@ -21,7 +21,7 @@ RUN uv venv .venv
 
 # Copy requirements and install Python dependencies into the venv
 COPY requirements.txt .
-COPY directory.py .
+COPY dictionary.py .
 COPY dictionary.tcss .
 RUN uv pip install -r requirements.txt