Fix Dockerfile requirements.txt installation

Dockerfile

@@ -2,7 +2,7 @@
 FROM --platform=linux/amd64 python:3.10.11
 WORKDIR /code
 RUN apt update && apt install gcc
-COPY ./requirements/ /code/requirements/
+COPY ./requirements.txt /code/requirements.txt
 RUN pip install pip --upgrade
 #installing requests befor the rest for lnpay compatibility
 RUN pip install requests