Merge pull request 'changed hibernate schema creation for test db' (#37) from enhancement/reorganize-databases into main

Reviewed-on: #37

backend/src/test/resources/application-test.yaml

@@ -1,9 +1,9 @@
 spring:
   datasource:
-    url : ${DB_TEST_URL}
+    url: ${DB_TEST_URL}
     username: ${DB_USERNAME}
     password: ${DB_PASSWORD}
     driver-class-name: ${PG_DRIVER_CLASS_NAME}
   jpa:
     hibernate:
-      ddl-auto: create-drop
+      ddl-auto: update

docs/02-Preparation/02-Spring-Boot-setup.md

@@ -138,7 +138,7 @@ spring:
 
 ```
 
-Note that I'm using my own locally hosted PostgreSQL instances for the main and test database. The Docker Compose file will look something like this:
+The Docker Compose file for code-server will look something like this:
 
 ```
 ---
@@ -163,26 +163,43 @@ services:
       - 8124:8080
       - 5173:5173
     restart: unless-stopped
+```
 
-  vaessl-db:
-    image: pgvector/pgvector:pg18
-    container_name: vaessl-db
-    environment:
-      - POSTGRES_DB=vaessl
-      - POSTGRES_USER=user
-      - POSTGRES_PASSWORD=pw
-    ports:
-      - 5433:5432
+Note that I'm using my own locally hosted PostgreSQL instances for the main and test database. Just add databases via SQL or PgAdmin and install the pgvector extension to each database manually. There is an offical ready-made pgvector docker image but if you already host a PostGreSQL database you need to add the extension yourself.
 
-  vassal-test-db:
-    image: pgvector/pgvector:pg18
-    container_name: vassal-test-db
-    environment:
-      - POSTGRES_DB=vassal_test
-      - POSTGRES_USER=user
-      - POSTGRES_PASSWORD=pw
-    ports:
-      - 5434:5432
+Check the name of your PostGreSQL container:
+```
+docker ps
+```
+
+Enter your container via bash:
+
+```
+docker exec -it 876fb382969f bash
+```
+Before working on your database backup your databases:
+```
+su - postgres -c "pg_dumpall > /tmp/backup200526.sql"
+
+#exit the container and copy the backup file to local file system 
+docker cp 876fb382969f:/tmp/backup200526.sql .
+```
+
+Install dependencies, build and install pgvector:
+apt-get update
+apt-get install -y build-essential git postgresql-server-dev-all
+```
+git clone https://github.com/pgvector/pgvector.git
+cd pgvector
+make
+make install
+docker restart 876fb382969f 
+```
+Enter PostGreSQL container and create pgvector extension for each databse:
+```
+docker exec -it <container-name> psql -h localhost -U <db-user> -d <db-name>
+
+CREATE EXTENSION vector;
 ```
 
 # Appendix: Additional config for developing in Code-Server