add login&pwd in JDBC url for PostgreSQL

I really don't know why exactly spring parameters are not used here,
probably for schema creation step. Until changing what the application does on startup
this will make it 'just work' without extra changes.

docker-compose-postgres.yml

@@ -7,7 +7,7 @@ services:
     environment:
       - WEBWOLF_HOST=webwolf
       - WEBWOLF_PORT=9090
-      - spring.datasource.url=jdbc:postgresql://webgoat_db:5432/webgoat
+      - spring.datasource.url=jdbc:postgresql://webgoat_db:5432/webgoat?user=webgoat&password=webgoat
       - spring.datasource.username=webgoat
       - spring.datasource.password=webgoat
       - spring.datasource.driver-class-name=org.postgresql.Driver
@@ -19,7 +19,7 @@ services:
   webwolf:
     image: webgoat/webwolf
     environment:
-      - spring.datasource.url=jdbc:postgresql://webgoat_db:5432/webgoat
+      - spring.datasource.url=jdbc:postgresql://webgoat_db:5432/webgoat?user=webgoat&password=webgoat
       - spring.datasource.username=webgoat
       - spring.datasource.password=webgoat
       - spring.datasource.driver-class-name=org.postgresql.Driver