feat: upgrade PostgreSQL to version 18 and update data volume path in Compose files

.github/workflows/build-and-test.yml

@@ -34,7 +34,7 @@ jobs:
         ports:
           - 6379:6379
       sqldb:
-        image: postgres:17
+        image: postgres:18.6
         env:
           POSTGRES_USER: panettone
           POSTGRES_PASSWORD: secret

README.md

@@ -47,7 +47,9 @@
     
 ## About The Project
 
-This demonstration application showcases the powerful integration of [FastAPI](https://fastapi.tiangolo.com/)—a modern, high-performance web framework—with [Pydantic 2.0](https://github.com/pydantic/pydantic) for robust data validation. The backend architecture is further reinforced by leveraging the [SQLAlchemy ORM](https://www.sqlalchemy.org/) along with an asynchronous connection to a [PostgreSQL 17](https://www.postgresql.org/docs/17/release.html) relational database. High-throughput communication across the stack is achieved using the [asyncpg](https://github.com/MagicStack/asyncpg) database client library, delivering an efficient, non-blocking interface to process database transactions seamlessly within Python's asyncio event loop.
+This demonstration application showcases the powerful integration of [FastAPI](https://fastapi.tiangolo.com/)—a modern, high-performance web framework—with [Pydantic 2.0](https://github.com/pydantic/pydantic) for robust data validation. The backend architecture is further reinforced by leveraging the [SQLAlchemy ORM](https://www.sqlalchemy.org/) along with an asynchronous connection to a [PostgreSQL 18](https://www.postgresql.org/docs/18/release.html) relational database. High-throughput communication across the stack is achieved using the [asyncpg](https://github.com/MagicStack/asyncpg) database client library, delivering an efficient, non-blocking interface to process database transactions seamlessly within Python's asyncio event loop.
+
+PostgreSQL 18 uses `/var/lib/postgresql` for its persistent data volume. Existing PostgreSQL 17 data must be migrated with `pg_upgrade` or a dump and restore before using the updated Compose configurations.
 
 ### Built With
 [![FastAPI][fastapi.tiangolo.com]][fastapi-url]

compose-ha.yml

@@ -54,7 +54,7 @@ services:
       context: ./db
       dockerfile: Dockerfile
     volumes:
-      - panettone_postgres_data:/var/lib/postgresql/data
+      - panettone_postgres_data:/var/lib/postgresql
       - ./db/create.sql:/docker-entrypoint-initdb.d/create.sql
     env_file:
       - .env

compose.yml

@@ -31,7 +31,7 @@ services:
       context: ./db
       dockerfile: Dockerfile
     volumes:
-      - panettone_postgres_data:/var/lib/postgresql/data
+      - panettone_postgres_data:/var/lib/postgresql
       - ./db/create.sql:/docker-entrypoint-initdb.d/create.sql
     env_file:
       - .env

db/Dockerfile

@@ -1,5 +1,5 @@
 # pull official base image
-FROM postgres:17.7-alpine
+FROM postgres:18.6-alpine
 
 WORKDIR /home/gx/code
 

granian-compose.yml

@@ -30,7 +30,7 @@ services:
       context: ./db
       dockerfile: Dockerfile
     volumes:
-      - fastapi_postgres_data:/var/lib/postgresql/data
+      - fastapi_postgres_data:/var/lib/postgresql
       - ./db/create.sql:/docker-entrypoint-initdb.d/create.sql
     env_file:
       - .env

valkey-compose.yml

@@ -24,7 +24,7 @@ services:
       context: ./db
       dockerfile: Dockerfile
     volumes:
-      - fastapi_postgres_data:/var/lib/postgresql/data
+      - fastapi_postgres_data:/var/lib/postgresql
     env_file:
       - .env
     ports: