Update Dockerfile

Author: AptS-1547

Dockerfile

@@ -18,13 +18,13 @@ WORKDIR /app
 ENV PYTHONDONTWRITEBYTECODE=1 \
     PYTHONUNBUFFERED=1
 
-COPY requirements.txt .
-RUN pip install --no-cache-dir -r requirements.txt
-
 RUN mkdir -p /app/templates \
     && adduser --disabled-password --gecos "" appuser \
     && chown -R appuser:appuser /app
 
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
 COPY --chown=appuser:appuser . .
 
 VOLUME [ "/app/templates" ]