Merge pull request #256 from hedgedoc/renovate/postgres-14.x

docker-compose.yml

@@ -6,7 +6,7 @@ services:
   database:
     # Don't upgrade PostgreSQL by simply changing the version number
     # You need to migrate the Database to the new PostgreSQL version
-    image: postgres:13.4-alpine
+    image: postgres:14.2-alpine
     #mem_limit: 256mb         # version 2 only
     #memswap_limit: 512mb     # version 2 only
     #read_only: true          # not supported in swarm mode please enable along with tmpfs