chore: upgrade n8n to 2.34.2 + postgres autoupgrade

- bump image n8nio/n8n:2.1.4 -> 2.34.2
- switch postgres image to pgautoupgrade/pgautoupgrade:18-alpine
- adjust postgres volume mount path for pgautoupgrade
- version label bump deferred to 'abra recipe release'

.env.sample

@@ -12,7 +12,6 @@ N8N_DIAGNOSTICS_ENABLED=false
 
 # Change to `true` to enable questionnaire-based customisation of the UI
 N8N_PERSONALIZATION_ENABLED=false
-#GENERIC_TIMEZONE=America/New_York
 
 # "Permit users to import specific built-in modules in the Code node"
 #NODE_FUNCTION_ALLOW_BUILTIN=*

compose.yml

@@ -1,6 +1,6 @@
 services:
   app:
-    image: n8nio/n8n:2.23.2
+    image: n8nio/n8n:2.34.2
     environment:
       - N8N_PERSONALIZATION_ENABLED
       - N8N_DIAGNOSTICS_ENABLED
@@ -8,7 +8,6 @@ services:
       - N8N_BASIC_AUTH_ACTIVE=false
       - WEBHOOK_URL=https://${DOMAIN}
       - NODE_FUNCTION_ALLOW_EXTERNAL=moment
-      - GENERIC_TIMEZONE
     networks:
       - proxy
       - internal_network
@@ -28,7 +27,7 @@ services:
         - "traefik.http.routers.${STACK_NAME}.middlewares=${STACK_NAME}-redirect"
         - "traefik.http.middlewares.${STACK_NAME}-redirect.redirectscheme.scheme=https"
         - "traefik.http.middlewares.${STACK_NAME}-redirect.redirectscheme.permanent=true"
-        - "coop-cloud.${STACK_NAME}.version=3.4.0+2.23.2"
+        - "coop-cloud.${STACK_NAME}.version=3.0.0+2.1.4"
         - "backupbot.backup=true"
         - "backupbot.backup.path=/home/node/.n8n"