Use nginx container-specific init folder

Dockerfile

@@ -4,12 +4,4 @@ FROM nginx:mainline-alpine
 RUN apk add hugo git
 
 # Copy over auxiliary scripts
-COPY aux /aux
-
-# Cron hook for pulling and building
-RUN echo "10 * * * * /aux/pull-n-build.sh" >> /var/spool/cron/crontabs/root
-
-# bootstrap script, basically cron && build
-# after that, the base-image-specific CMD will kick in, which is quite complex
-ENTRYPOINT /aux/bootstrap.sh
-
+COPY aux/* /docker-entrypoint.d/

aux/bootstrap.sh

@@ -1,13 +0,0 @@
-#!/bin/sh
-
-# stop on error
-set -e
-
-# start cron daemon (goes into background)
-crond
-
-# pull and build freshly
-/aux/pull-n-build.sh
-
-# run nginx
-nginx -g "daemon off;"

aux/cron.sh

@@ -0,0 +1,15 @@
+#!/bin/sh
+
+# stop on error
+set -e
+
+if [ "$BUILDFREQ" == "" ]; then
+	# set default
+	BUILDFREQ=10
+fi
+
+# Run the pull script regularly
+RUN echo "$BUILDFREQ * * * * /docker-entrypoint.d/pull-n-build.sh" >> /var/spool/cron/crontabs/root
+
+# start cron daemon (goes into background)
+crond