Update portainer/portainer-ce Docker tag to v2.31.0

Reviewed-on: #4

README.md

@@ -0,0 +1,34 @@
+# Docker Compose Repository: Portainer
+
+This repo contains a docker compose file to deploy Portainer Community Edition
+
+## Deployment
+
+- Clone the repository
+- `cd` into the cloned folder 
+- Deploy the stack via `docker compose up -d`
+
+## Updating
+
+Since Portainer cannot manage stacks that were created outside of itself, updates must be handled separately. 
+
+The necessary steps are:
+
+- Update tag in `docker-compose.yaml`
+- `docker compose pull`
+- `docker compose up -d`
+
+### Automatic updates via cron
+
+This repository contains an [update script](update.sh) for use with cron. It checks whether the remote had new commits that are not present locally. If this is the case, it pulls from remote and redeploys the stack.
+
+For example, the following entry can be used to set up a user cron job with `crontab -e`, assuming that the repository is stored in `/srv/portainer`.
+
+```
+15,45 * * * * /srv/portainer/update.sh 2>&1 | logger -t portainerupdate
+```
+
+- The script runs every 30 minutes at minute 15 and 45
+- Messages from `stderr` are redirected to `stdout`
+- Output is piped to logger, tagged as `portainerupdate`
+    - It can be viewed with `journalctl -t portainerupdate`

docker-compose.yml

@@ -2,7 +2,7 @@ name: portainer
 
 services:
   portainer-ce:
-    image: portainer/portainer-ce:2.27.3
+    image: portainer/portainer-ce:2.31.0
     container_name: portainer
     restart: unless-stopped
     volumes:

renovate.json

@@ -0,0 +1,15 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "config:recommended"
+  ],
+  "labels": ["renovate"],
+  "configMigration": true,
+  "packageRules": [
+    {
+      "matchUpdateTypes": ["minor", "patch"],
+      "automerge": true,
+      "ignoreTests": true
+    }
+  ]
+}

update.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+
+cd $(dirname $0)
+
+local_head=$(git rev-parse HEAD)
+upstream_ref=$(git rev-parse --abbrev-ref @{u} | sed 's/\// /')
+remote_head=$(git ls-remote $upstream_ref | cut -f1)
+
+if [[ $local_head != $remote_head ]]; then
+  git pull
+  docker compose pull
+  docker compose up -d
+fi