fix: SYNAPSE_SERVER_NAME → SERVER_NAME;

SYNAPSE_SERVER_NAME seems to only be used in the Docker-specific
"generate" command, which we're not using (instead templating a
`homeserver.yaml` file using Golang templating)

compose.discord.yml

@@ -30,7 +30,7 @@ services:
       - internal
 
   discorddb:
-    image: postgres:18-alpine
+    image: postgres:13-alpine
     secrets:
       - discord_db_password
     environment:

compose.signal.yml

@@ -35,7 +35,7 @@ services:
       - internal
 
   signaldb:
-    image: postgres:18-alpine
+    image: postgres:13-alpine
     secrets:
       - signal_db_password
     environment:

compose.telegram.yml

@@ -40,7 +40,7 @@ services:
       - internal
 
   telegramdb:
-    image: postgres:18-alpine
+    image: postgres:13-alpine
     secrets:
       - telegram_db_password
     environment:

compose.yml

@@ -84,7 +84,7 @@ services:
       - STACK_NAME
       - SYNAPSE_ADMIN_EMAIL
       - SYNAPSE_REPORT_STATS=no
-      - SYNAPSE_SERVER_NAME=${DOMAIN}
+      - SERVER_NAME
       - USER_IPS_MAX_AGE
       - VIRTUAL_HOST=${DOMAIN}
       - VIRTUAL_PORT=8008

renovate.json

@@ -1,6 +0,0 @@
-{
-  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
-  "extends": [
-    "config:recommended"
-  ]
-}