Upgrading to Caddy 2.1

Dockerfile

@@ -1,22 +1,26 @@
-FROM caddy:builder AS builder
+ARG version=2.1.0-beta.1
 
-RUN caddy-builder \
-   github.com/caddy-dns/cloudflare
+FROM golang:1.14-alpine3.11 AS builder
+ARG version
 
-FROM caddy:2.0.0
+WORKDIR /src
 
-COPY --from=builder /usr/bin/caddy /usr/bin/caddy
+RUN apk add --no-cache \
+   git \
+   ca-certificates
 
+RUN go get -u github.com/caddyserver/xcaddy/cmd/xcaddy
+
+ENV CADDY_VERSION="v${version}"
+RUN xcaddy build --with github.com/caddy-dns/cloudflare --output /usr/bin/caddy
+
+RUN /usr/bin/caddy version
+
+FROM caddy:${version}
 LABEL maintainer "Fabian Stamm <dev@fabianstamm.de>"
 
-# RUN apk add --no-cache \
-#    ca-certificates \
-#    git \
-#    mailcap \
-#    openssh-client \
-#    tzdata \
-#    bash \
-#    curl
+
+COPY --from=builder /usr/bin/caddy /usr/bin/caddy
 
 
 #Validate install