feat: add more granular configuration via env vars

Dockerfile

@@ -1,39 +1,43 @@
 FROM docker.jcg.re/base-alpine
 MAINTAINER Jan Christian Grünhage <jan.christian@gruenhage.xyz>
 
+ARG CLONE_URL=github.com/mholt/caddy
+ARG BRANCH=tags/v0.10.10
+
 ENV GOPATH=/gopath \
-      CADDY_REPO_OWNER=mholt \
+    UID=192 \
-      CADDY_REPO_NAME=caddy \
+    GID=192
-      CADDY_BRANCH=tags/v0.10.10 \
-      CADDYPATH=/caddy \
-      UID=192 \
-      GID=192
 
-ADD	plugins.txt /plugins
+ADD plugins.txt /plugins
 
-RUN	apk upgrade --update \
+RUN apk upgrade --update \
- 			&& apk add build-base su-exec libcap go git \
+ && apk add \
-			&& mkdir -p $GOPATH/src/github.com/$CADDY_REPO_OWNER \
+      build-base \
-			&& cd $GOPATH/src/github.com/$CADDY_REPO_OWNER \
+      su-exec \
-			&& git clone https://github.com/$CADDY_REPO_OWNER/$CADDY_REPO_NAME \
+      libcap \
-			&& cd $CADDY_REPO_NAME \
+      go \
-			&& git checkout $CADDY_BRANCH \
+      git \
-			&& cd caddy/caddymain \
+      bash \
-			&& export line="$(grep -n "// This is where other plugins get plugged in (imported)" < run.go | sed 's/^\([0-9]\+\):.*$/\1/')" \
+ && mkdir -p ${GOPATH}/src/${CLONE_URL} \
-			&& head -n ${line} run.go > newrun.go \
+ && cd $GOPATH/src/${CLONE_URL} \
-			&& cat /plugins >> newrun.go \
+ && git clone https://${CLONE_URL} . \
-			&& line=`expr $line + 1` \
+ && git checkout ${BRANCH} \
-			&& tail -n +${line} run.go >> newrun.go \
+ && cd caddy/caddymain \
-			&& rm -f run.go \
+ && export LINE="$(grep -n "// This is where other plugins get plugged in (imported)" < run.go | sed 's/^\([0-9]\+\):.*$/\1/')" \
-			&& mv newrun.go run.go \
+ && head -n ${LINE} run.go > newrun.go \
-			&& go get github.com/$CADDY_REPO_OWNER/$CADDY_REPO_NAME/... \
+ && cat /plugins >> newrun.go \
-			&& mv $GOPATH/bin/caddy /usr/bin \
+ && line=`expr ${LINE} + 1` \
-			&& setcap cap_net_bind_service=+ep /usr/bin/caddy \
+ && tail -n +${LINE} run.go >> newrun.go \
-			&& apk del --purge build-base go \
+ && rm -f run.go \
-			&& mkdir $CADDYPATH \
+ && mv newrun.go run.go \
-			&& rm -rf $GOPATH /var/cache/apk/* /plugins
+ && go get ${CLONE_URL}/... \
+ && mv $GOPATH/bin/caddy /usr/bin \
+ && setcap cap_net_bind_service=+ep /usr/bin/caddy \
+ && apk del --purge build-base go \
+ && mkdir /caddy \
+ && rm -rf $GOPATH /var/cache/apk/* /plugins
 
-ADD	root /
+ADD root /
 
-EXPOSE		2015 80 443
+EXPOSE 2015 80 443
-VOLUME		["$CADDYPATH"]
+VOLUME ["/caddy", "/var/www"]

root/etc/Caddyfile.insecure.template

@@ -0,0 +1,3 @@
+:80 {
+	root /var/www
+}

root/etc/Caddyfile.secure.template

@@ -0,0 +1,4 @@
+DOMAIN {
+	root /var/www
+	tls EMAIL
+}

root/etc/s6.d/caddy/run

@@ -1,3 +1,23 @@
-#!/bin/sh
+#!/bin/bash
-chown -R ${UID}:${GID} /caddy
+if [[ -z ${CADDYPATH} ]]; then
-exec su-exec ${UID}:${GID} /usr/bin/caddy -quic --conf /caddy/Caddyfile
+	export CADDYPATH=/caddy
+fi
+P="--conf /etc/Caddyfile"
+if [[ -n ${USE_QUIC} ]]; then
+	P="-quic $P"
+fi
+if [[ -n ${LE_STAGING} ]]; then
+	P="-ca acme-staging.api.letsencrypt.org/directory $P"
+fi
+chown -R ${UID}:${GID} /var/www
+chown -R ${UID}:${GID} ${CADDYPATH}
+if [[ ! -f /etc/Caddyfile ]]; then
+	if [[ -z "$DOMAIN" || -z "$EMAIL" ]]; then
+		cp /etc/Caddyfile.insecure.template /etc/Caddyfile
+	else
+		cp /etc/Caddyfile.secure.template /etc/Caddyfile
+		sed -i -e "s/DOMAIN/${DOMAIN}/" -e "s/EMAIL/${EMAIL}/" /etc/Caddyfile
+	fi
+fi
+cd ${CADDYPATH}
+su-exec ${UID}:${GID} /usr/bin/caddy $P