Build caddy ourselves with cloudflare and tcp support

docker/Dockerfile

@@ -1,8 +1,13 @@
-FROM caddy:alpine
+FROM alpine
 
 # Change to http respositories, so they we can cache the install packages
 RUN if [ -n "${HTTP_PROXY}" ] ; then echo "Using HTTP PROXY [${HTTP_PROXY}]" && sed -i -e s'/https/http/' /etc/apk/repositories; fi
 
+RUN apk --no-cache add xcaddy \
+	&& xcaddy build --with github.com/caddy-dns/cloudflare --with github.com/mholt/caddy-l4 --output=/usr/sbin/caddy \
+	&& apk --no-cache del xcaddy \
+	&& rm -rf /root/go /root/.cache
+
 # Configuration
 COPY Caddyfile /etc/caddy/Caddyfile
 COPY default.key default.crt /etc/caddy/ssl/
@@ -10,6 +15,7 @@ COPY maintenance /var/www/html
 RUN mkdir /etc/caddy/sites
 
 # Starting
+ENV XDG_DATA_HOME=/data
 EXPOSE 80 443
 CMD ["caddy","run","--config","/etc/caddy/Caddyfile","--adapter","caddyfile","--resume"]
 VOLUME [ "${XDG_DATA_HOME}" ]