Build caddy with plugin (#43)

* Add build stage

* Add custom build

* Use golang:1.8 as base

since it include git that is needed.

* Use alpine as base build env

Author: sapk

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 && \
-  apk add wget mailcap ca-certificates && \
-  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"]
+RUN apk add --no-cache wget mailcap ca-certificates
+COPY --from=build-env /go/bin/caddy /usr/sbin/caddy
 
 COPY docker/caddy.conf /etc/caddy.conf
 COPY public /srv/www
+
+CMD ["/usr/sbin/caddy", "-conf", "/etc/caddy.conf"]