update deps and optimize dockerfile

.dockerignore

@@ -0,0 +1,3 @@
+*
+!Pipfile*
+!src

Dockerfile

@@ -1,13 +1,13 @@
-FROM python:3.9-alpine
+FROM python:3.10-alpine
 
-WORKDIR /tmp
-RUN pip install pipenv
-COPY ./Pipfile* ./
-RUN pipenv install --system --deploy
+WORKDIR /action
 
+COPY ./Pipfile* ./
+RUN pip install pipenv && \
+  pipenv install --system --deploy && \
+  pipenv --clear
 
-WORKDIR /action
 COPY ./src .
 
 ENTRYPOINT [ "python" ]
-CMD [ "/action/main.py" ]
+CMD [ "/action/main.py" ]

Pipfile

@@ -13,4 +13,4 @@ autopep8 = "*"
 mypy = "*"
 
 [requires]
-python_version = "3.9"
+python_version = "3.10"

src/main.py

@@ -1,6 +1,6 @@
-from typing import Dict
 from os import environ
 from os.path import join
+from typing import Dict
 
 import requests
 from markdown import markdown