docker: setuptools is needed by gevent

Temporary fix until this is merged
https://gitlab.alpinelinux.org/alpine/aports/-/merge_requests/27419

Author: abitrolly

Dockerfile

@@ -2,7 +2,8 @@ FROM alpine:3.14
 # fetching cheat sheets
 ## installing dependencies
 RUN apk add --update --no-cache git py3-six py3-pygments py3-yaml py3-gevent \
-      libstdc++ py3-colorama py3-requests py3-icu py3-redis sed
+      libstdc++ py3-colorama py3-requests py3-icu py3-redis sed \
+      py3-setuptools  # https://gitlab.alpinelinux.org/alpine/aports/-/merge_requests/27419
 ## copying
 WORKDIR /app
 COPY . /app