chore: added upgrade information

README.md

@@ -191,6 +191,20 @@ docker compose -p preview down
 
 </details>
 
+### Upgrade Database to Postgres 14
+If you are upgrading from Postgres 11 to 14, you will need to run the following command to upgrade the database:
+
+- Add your Database password + User into the `./scripts/db-upgrade-docker-compose.yml` file
+- Adjust volumes if needed - standard is migration from volume `postgres-data` to `postgres14-data`
+- Run the following command to upgrade the database:
+``` console
+# Start upgrading container
+docker compose -f ./scripts/db-upgrade-docker-compose.yml up
+# Stop it manually after the upgrade is done with cmd + c
+```
+- Adjust volume to the upgraded volume `postgres14-data` in the `docker-compose.yml` file
+- Start the stack again
+
 ### Check Cardano DB sync progress
 Use the GraphQL Playground in the browser at http://localhost:3100/graphql:
 > **_Note_** This Query is not available in early Era's of Cardano. Check Points of Interest here: [Link](https://ogmios.dev/mini-protocols/local-chain-sync/#points-of-interest) 

db-upgrade-docker-compose.yml

@@ -0,0 +1,16 @@
+version: "3.8"
+
+services:
+  db-upgrade:
+    platform: linux/x86_64
+    image: pgautoupgrade/pgautoupgrade:latest
+    environment:
+      - POSTGRES_LOGGING=true
+      - POSTGRES_PASSWORD=doNoUseThisSecret!
+      - POSTGRES_USER=postgres
+    volumes:
+      - postgres-data:/var/lib/postgresql/11/data
+      - postgres14-data:/var/lib/postgresql/14/data
+volumes:
+  postgres-data:
+  postgres14-data:

docker-compose.yml

@@ -2,7 +2,7 @@ version: "3.8"
 
 services:
   postgres:
-    image: postgres:${POSTGRES_VERSION:-12.18-bullseye}
+    image: postgres:${POSTGRES_VERSION:-14.10-alpine}
     environment:
       - POSTGRES_LOGGING=true
       - POSTGRES_DB_FILE=/run/secrets/postgres_db
@@ -16,7 +16,7 @@ services:
       - postgres_user
     shm_size: '2gb'
     volumes:
-      - postgres-data:/var/lib/postgresql/data
+      - postgres14-data:/var/lib/postgresql/data
     restart: on-failure
     logging:
       driver: "json-file"
@@ -149,4 +149,4 @@ volumes:
   db-sync-data:
   node-db:
   node-ipc:
-  postgres-data:
+  postgres14-data: