issue#3 build for latest os

Makefile

@@ -1,13 +1,13 @@
 OUTDIR = ./build
 
-.PHONY: centos7 centos6 alpine37 debian9 ubuntu14 ubuntu16 clean all list
+.PHONY: centos7 centos6 alpine37 alpine310 debian9 debian10 ubuntu14 ubuntu16 clean all list
 
-all: alpine37 centos7 centos6 debian9 ubuntu14 ubuntu16
+all: alpine37 alpine310 centos7 centos6 debian9 debian10 ubuntu14 ubuntu16
 
 list:
 	@$(MAKE) -rpn | sed -n -e '/^$$/ { n ; /^[^ .#][^ ]*:/ { s/:.*$$// ; p ; } ; }' | sort
 
-alpine37 centos6 centos7 debian9 ubuntu14 ubuntu16:
+alpine37 alpine310 centos6 centos7 debian9 debian10 ubuntu14 ubuntu16:
 	@if [ ! -d $(OUTDIR) ]; then mkdir -p $(OUTDIR); fi
 	@echo "Symlinking $@ Dockerfile.."
 	@ln -s $@/Dockerfile ./Dockerfile

alpine310/Dockerfile

@@ -0,0 +1,13 @@
+FROM alpine:3.10.3
+COPY ./ccr/requirements.txt /tmp/requirements.txt
+COPY ./ccr/* /tmp/
+ENV PATH="${PATH}:/ccr"
+RUN  apk update && \
+       /sbin/apk add python3 && \
+       /bin/mkdir -p /ccr/ccr.d && \
+       /usr/bin/python3 -m venv /ccr/ccr.d && \
+       /ccr/ccr.d/bin/pip install -r /tmp/requirements.txt && \
+       /bin/mv /tmp/ccr.py /ccr/ccr && \
+       /bin/chmod +x /ccr/ccr && \
+       /bin/rm -rf /tmp/* && \
+       /bin/rm -rf /var/cache/apk/*

ccr/requirements.txt

@@ -1,3 +1,3 @@
 hvac==0.3.0
-requests==2.18.4
-Jinja2==2.10
+requests==2.20.0
+Jinja2==2.10.1

debian10/Dockerfile

@@ -0,0 +1,13 @@
+FROM debian:buster
+COPY ./ccr/requirements.txt /tmp/requirements.txt
+COPY ./ccr/ccr.py /tmp
+ENV PATH="${PATH}:/ccr"
+RUN  /usr/bin/apt-get update && \
+       /usr/bin/apt-get install -y python3-minimal python3-venv && \
+       /bin/mkdir -p /ccr/ccr.d && \
+       /usr/bin/python3 -m venv /ccr/ccr.d && \
+       /ccr/ccr.d/bin/pip3 install -r /tmp/requirements.txt && \
+       /bin/mv /tmp/ccr.py /ccr/ccr && \
+       /bin/chmod +x /ccr/ccr && \
+       /bin/rm -f /tmp/requirements.txt && \
+       /usr/bin/apt-get clean