Move to Alpine:3.8 and fixing #522

core/nginx/Dockerfile

@@ -1,6 +1,9 @@
-FROM alpine:3.7
+FROM alpine:3.8
 
-RUN apk add --no-cache nginx nginx-mod-mail python py-jinja2 certbot openssl
+RUN apk add --no-cache certbot nginx nginx-mod-mail openssl \
+ python py-jinja2 py-requests-toolbelt py-pip \
+ && pip install --upgrade pip \
+ && pip install idna
 
 COPY conf /conf
 COPY *.py /