Fix moving all python files to docker image context

Dockerfile

 FROM ubuntu:20.04
 
-COPY requirements.txt /requirements.txt
+# Just copy everything
+COPY . /pypcc
 
 RUN apt-get update && apt-get install -y python3 python3-pip python3-yaml git && \
-    pip3 install -r requirements.txt
+    pip3 install -r /pypcc/requirements.txt
 
-WORKDIR ./
+WORKDIR /pypcc