Added Caddy v1.0.5 Docker Image

Signed-off-by: Teddysun <i@teddysun.com>

docker/caddy/Dockerfile.architecture

@@ -0,0 +1,40 @@
+# Dockerfile for caddy v1.0.5 based alpine
+# Copyright (C) 2020 Teddysun <i@teddysun.com>
+# Reference URL:
+# https://github.com/caddyserver/caddy
+# https://github.com/caddyserver/forwardproxy
+
+FROM --platform=${TARGETPLATFORM} alpine:3.12
+LABEL maintainer="Teddysun <i@teddysun.com>"
+
+ARG TARGETPLATFORM
+WORKDIR /root
+COPY caddy.sh /root/caddy.sh
+RUN set -ex \
+	&& mkdir -p /config/caddy /data/caddy /etc/caddy /usr/share/caddy \
+	&& apk add --no-cache tzdata ca-certificates mailcap \
+	&& chmod +x /root/caddy.sh \
+	&& /root/caddy.sh "${TARGETPLATFORM}" \
+	&& rm -fv /root/caddy.sh
+
+# set up nsswitch.conf for Go's "netgo" implementation
+# see: https://github.com/docker-library/golang/blob/1eb096131592bcbc90aa3b97471811c798a93573/1.14/alpine3.12/Dockerfile#L9
+RUN [ ! -e /etc/nsswitch.conf ] && echo 'hosts: files dns' > /etc/nsswitch.conf
+
+COPY Caddyfile /etc/caddy/Caddyfile
+COPY index.html /usr/share/caddy/index.html
+
+# See https://caddyserver.com/docs/conventions#file-locations for details
+ENV XDG_CONFIG_HOME /config
+ENV XDG_DATA_HOME /data
+
+VOLUME /etc/caddy
+VOLUME /config
+VOLUME /data
+
+EXPOSE 80
+EXPOSE 443
+EXPOSE 2015
+
+ENV TZ=Asia/Shanghai
+CMD [ "/usr/bin/caddy", "--config", "/etc/caddy/Caddyfile" ]