Adding support for building on arm64v8

Dockerfile.arm64v8

@@ -0,0 +1,59 @@
+FROM arm64v8/python:3.6-alpine
+
+# RUN apk upgrade --update-cache --available
+RUN apk add --no-cache \
+      bash \
+      build-base \
+      ca-certificates \
+      cyrus-sasl-dev \
+      graphviz \
+      ttf-ubuntu-font-family \
+      jpeg-dev \
+      libffi-dev \
+      libxml2-dev \
+      libxslt-dev \
+      openldap-dev \
+# This dependency fails while building
+#     openssl-dev \
+      libressl-dev \
+      postgresql-dev \
+      wget
+
+RUN pip install \
+# gunicorn is used for launching netbox
+      gunicorn \
+# napalm is used for gathering information from network devices
+      napalm \
+# ruamel is used in startup_scripts
+      ruamel.yaml
+
+WORKDIR /opt
+
+ARG BRANCH=master
+ARG URL=https://github.com/digitalocean/netbox/archive/$BRANCH.tar.gz
+RUN wget -q -O - "${URL}" | tar xz \
+  && mv netbox* netbox
+
+WORKDIR /opt/netbox
+RUN pip install -r requirements.txt
+
+COPY docker/configuration.docker.py /opt/netbox/netbox/netbox/configuration.py
+COPY configuration/gunicorn_config.py /etc/netbox/config/
+COPY docker/nginx.conf /etc/netbox-nginx/nginx.conf
+COPY docker/docker-entrypoint.sh docker-entrypoint.sh
+COPY startup_scripts/ /opt/netbox/startup_scripts/
+COPY initializers/ /opt/netbox/initializers/
+COPY configuration/configuration.py /etc/netbox/config/configuration.py
+
+WORKDIR /opt/netbox/netbox
+
+ENTRYPOINT [ "/opt/netbox/docker-entrypoint.sh" ]
+
+VOLUME ["/etc/netbox-nginx/"]
+
+CMD ["gunicorn", "-c /etc/netbox/config/gunicorn_config.py", "netbox.wsgi"]
+
+LABEL SRC_URL="$URL"
+
+ARG NETBOX_DOCKER_PROJECT_VERSION=snapshot
+LABEL NETBOX_DOCKER_PROJECT_VERSION="$NETBOX_DOCKER_PROJECT_VERSION"