Build caddy with plugins via multi-stage (#121)

* build caddy with plugins via multi-stage
* drone sig
  Signed-off-by: Kim "BKC" Carlbäcker <kim.carlbacker@gmail.com>

.drone.yml

@@ -13,6 +13,7 @@ pipeline:
 
   docker:
     image: plugins/docker
+    pull: true
     repo: gitea/docs
     tags: [ '${DRONE_BRANCH##release/v}' ]
     when:
@@ -21,6 +22,7 @@ pipeline:
 
   docker:
     image: plugins/docker
+    pull: true
     repo: gitea/docs
     tags: [ 'latest' ]
     when:

.drone.yml.sig

@@ -1 +1 @@
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Dockerfile

@@ -1,16 +1,22 @@
+# build stage
+FROM golang:alpine AS build-env
+
+RUN apk add --no-cache git 
+RUN go get -d -v github.com/mholt/caddy/caddy github.com/pedronasser/caddy-search github.com/simia-tech/caddy-locale
+WORKDIR /go/src/github.com/mholt/caddy/caddy
+
+RUN sed -i '/This is where other plugins get plugged in (imported)/a _ "github.com/pedronasser/caddy-search"' caddymain/run.go \
+ && sed -i '/This is where other plugins get plugged in (imported)/a _ "github.com/simia-tech/caddy-locale"' caddymain/run.go \
+ && go install -v . \
+ && /go/bin/caddy -version
+
 FROM alpine:edge
 EXPOSE 80
 
-RUN apk update && \
+RUN apk add --no-cache wget mailcap ca-certificates
-  apk add wget mailcap ca-certificates && \
+COPY --from=build-env /go/bin/caddy /usr/sbin/caddy
-  rm -rf /var/cache/apk/* && \
-  wget -O /tmp/caddy.tar.gz "https://caddyserver.com/download/build?os=linux&arch=amd64&features=locale%2Csearch" && \
-  mkdir -p /tmp/caddy && \
-  tar xvzf /tmp/caddy.tar.gz -C /tmp/caddy && \
-  cp /tmp/caddy/caddy /usr/sbin/caddy && \
-  rm -rf /tmp/caddy*
-
-CMD ["/usr/sbin/caddy", "-conf", "/etc/caddy.conf"]
 
 COPY docker/caddy.conf /etc/caddy.conf
 COPY public /srv/www
+
+CMD ["/usr/sbin/caddy", "-conf", "/etc/caddy.conf"]