trim docker files

Dockerfile

@@ -1,11 +1,8 @@
 FROM python:alpine
-RUN pip install --upgrade pip
 LABEL version="1.0.3" maintainer="rskntroot@gmail.com"
 
-RUN apk add --no-cache \
-  make \
-  py3-sphinx
-RUN pip install myst-parser pydata-sphinx-theme
+RUN pip install --upgrade pip myst-parser pydata-sphinx-theme
+RUN apk add --no-cache py3-sphinx make
 
 WORKDIR /opt/sphinx
 

compose.yml

@@ -1,5 +1,3 @@
-version: "3.8"
-
 services:
   sphinx-docs:
     image: rskio/sphinx-docs