refactor: Disable PostgreSQL by default, fixes #317

.devcontainer/docker-compose.yml

@@ -9,13 +9,14 @@ services:
       - ../installation/frappe-mariadb.cnf:/etc/mysql/conf.d/frappe.cnf
       - mariadb-vol:/var/lib/mysql
 
-  postgresql:
-    image: postgres:11.8
-    restart: on-failure
-    environment:
-      - POSTGRES_PASSWORD=123
-    volumes:
-      - postgresql-vol:/var/lib/postgresql/data
+  # Enable PostgreSQL only if you use it, see development/README.md for more information.
+  # postgresql:
+  #   image: postgres:11.8
+  #   restart: on-failure
+  #   environment:
+  #     - POSTGRES_PASSWORD=123
+  #   volumes:
+  #     - postgresql-vol:/var/lib/postgresql/data
 
   redis-cache:
     image: redis:alpine

development/README.md

@@ -24,7 +24,10 @@ cd frappe_docker
 
 ## Use VSCode Remote Containers extension
 
-For most people getting started with Frappe development, the best solution is to use [ VSCode Remote - Containers extension](https://marketplace.visualstudio.com/items?itemName=ms-vscode-remote.remote-containers).
+For most people getting started with Frappe development, the best solution is to use [VSCode Remote - Containers extension](https://marketplace.visualstudio.com/items?itemName=ms-vscode-remote.remote-containers).
+
+Before opening the folder in container, determine the database that you want to use. The default is MariaDB.
+If you want to use PostgreSQL instead, edit `.devcontainer/docker-compose.yml` and uncomment the section for `postgresql` service, and you may also want to comment `mariadb` as well.
 
 VSCode should automatically inquire you to install the required extensions, that can also be installed manually as follows: