Added common.yml compose file, updated docker-compose.yml

compose/common.yml

@@ -0,0 +1,8 @@
+postgresql_common:
+  build: pgclient/system_test
+  environment:
+    POSTGRES_PASSWORD: test # Set password for default (postgres) user
+    PGPASSWORD: test        # For using `psql -c ...` without password
+
+  # Override
+  command: echo "CREATE DATABASE test WITH OWNER postgres;" >> /docker-entrypoint-initdb.d/create_db.sql && /docker-entrypoint.sh

docker-compose.yml

@@ -1,6 +1,32 @@
+# Latest one
 postgresql:
-  build: pgclient/system_test
   ports:
     - "0.0.0.0:5432:5432"
-  environment:
-    POSTGRES_PASSWORD: test
+  extends:
+    file: compose/common.yml
+    service: postgresql_common
+
+# Older verions
+postgresql_90:
+  image: postgres:9.0
+  ports:
+    - "0.0.0.0:54390:5432"
+  extends:
+    file: compose/common.yml
+    service: postgresql_common
+
+postgresql_91:
+  image: postgres:9.1
+  ports:
+    - "0.0.0.0:54391:5432"
+  extends:
+    file: compose/common.yml
+    service: postgresql_common
+
+postgresql_92:
+  image: postgres:9.2
+  ports:
+    - "0.0.0.0:54392:5432"
+  extends:
+    file: compose/common.yml
+    service: postgresql_common