Upgrade Dockerfile FROM to latest Python on Alpine.

Author: rht

Dockerfile

@@ -1,7 +1,7 @@
-FROM hackerkid/zulip-archive
+FROM python:3-alpine
 
-RUN mkdir -p /zulip-archive
+RUN mkdir -p /zulip-archive && apk update && apk add git curl
 
 COPY . /zulip-archive-action/
 
-ENTRYPOINT ["/zulip-archive-action/entrypoint.sh"]
+ENTRYPOINT ["sh", "/zulip-archive-action/entrypoint.sh"]

entrypoint.sh

@@ -30,6 +30,8 @@ virtualenv -p python3 .
 source bin/activate
 pip3 install zulip==0.6.3
 pip3 install pyyaml==5.2
+# crudini is not available as an Alpine pkg, so we install via pip.
+pip3 install crudini
 
 # GitHub pages API is in Preview mode. This might break in future.
 auth_header="Authorization: Bearer ${github_personal_access_token}"