optimize build (#2098)

Author: puckpuck

src/load-generator/Dockerfile

@@ -15,8 +15,8 @@ RUN pip install --prefix="/reqs" -r requirements.txt
 FROM base
 WORKDIR /usr/src/app/
 COPY --from=builder /reqs /usr/local
-COPY ./src/load-generator/locustfile.py .
-COPY ./src/load-generator/people.json .
 ENV PLAYWRIGHT_BROWSERS_PATH=/opt/pw-browsers
 RUN playwright install --with-deps chromium
+COPY ./src/load-generator/locustfile.py .
+COPY ./src/load-generator/people.json .
 ENTRYPOINT ["locust", "--skip-log-setup"]