Optimize docker files

docker/Dockerfile

@@ -0,0 +1,26 @@
+FROM alpine:latest
+
+ENV TZ "UTC"
+ENV SCHEDULE "* * * * *"
+
+## Configure runtime variables for nsupdate
+ENV NSUPDATE_CONFD_DIR="/config"
+ENV NSUPDATE_LOG_DIR="/log"
+
+## Install requirements
+RUN apk update
+RUN apk add --no-cache git curl libxml2-utils tzdata
+
+# Read timezone from server, so in docker-compose you can change TZ
+RUN ln -sf "/usr/share/zoneinfo/${TZ}" /etc/localtime && \
+ echo "${TZ}" > /etc/timezone && date
+
+COPY ../nsupdate.sh /usr/local/bin/nsupdate.sh
+RUN chmod +x /usr/local/bin/nsupdate.sh
+
+COPY docker/entrypoint.sh /
+RUN chmod +x /entrypoint.sh
+ENTRYPOINT ["/entrypoint.sh"]
+
+VOLUME /config
+VOLUME /log

docker-compose.yml → docker/docker-compose.yml

@@ -1,9 +1,15 @@
-version: "3.3"
+version: '3'
+
 services:
- sonarr:
- image: nsupdate:latest
+ nsupdate:
+ image: nsupdate
  container_name: nsupdate
+ build:
+ context: https://github.com/chrisb86/nsupdate.git
+ dockerfile: docker/Dockerfile
  environment:
+ - SCHEDULE="*\2 * * * *"
+ - TZ=Europe/Berlin
  - NSUPDATE_INWX_USER=YOUR_INWX_USERNAME
  - NSUPDATE_INWX_PASSWORD=YOUR_INWX_PASSWORD
  volumes:

docker/entrypoint.sh

@@ -0,0 +1,4 @@
+#! /bin/sh
+
+echo "${SCHEDULE} sh nsupdate.sh" >> /etc/crontabs/root
+crond -l 2 -f > /dev/stdout 2> /dev/stderr &