Add mailserver.

docker-compose.yaml

@@ -0,0 +1,23 @@
+services:
+  poste.io:
+    image: analogic/poste.io:2.3.21
+    container_name: posteio
+    tty: true
+    network_mode: host
+    restart: unless-stopped
+    # despite it being in network: host mode, I like seeing the ports here.
+    ports:
+      - '25:25'
+      - '80:80'
+      - '443:443'
+      - '110:110'
+      - '143:143'
+      - '465:465'
+      - '587:587'
+      - '993:993'
+      - '995:995'
+    environment:
+      - TZ=UTC
+      - DISABLE_CLAMAV=TRUE
+    volumes:
+      - '/opt/poste.io/data:/data'

renovate.json

@@ -0,0 +1,6 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": ["config:best-practices"],
+  "semanticCommits": "enabled",
+  "assignees": ["jahanson"]
+}