Change base image and bump py-scale-codec

Dockerfile

@@ -1,22 +1,26 @@
 # base image
-FROM python:3.6.4-alpine
+FROM python:3.6-buster
 ENV PYTHONUNBUFFERED 1
 
 # set working directory
 RUN mkdir -p /usr/src/app
 WORKDIR /usr/src/app
 
-RUN apk add --no-cache --virtual .build-deps gcc libc-dev git
+RUN apt-get install -y gcc libc-dev git
 
 RUN pip3 install --upgrade pip
 
+RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain nightly && cp $HOME/.cargo/bin/* /usr/bin/
+
+ENV RUSTFLAGS="-C target-feature=-crt-static"
+
 # add requirements
 COPY ./requirements.txt /usr/src/app/requirements.txt
 
 # install requirements
 RUN pip3 install -r requirements.txt
 
-RUN apk del .build-deps gcc libc-dev git
+RUN apt-get remove -y gcc libc-dev git
 
 # add app
 COPY . /usr/src/app

requirements.txt

@@ -36,5 +36,5 @@ urllib3==1.25.3
 xxhash==1.3.0
 zipp==0.5.2
 
-scalecodec>=0.9.36
+scalecodec>=0.9.46
 substrate-interface>=0.9.9