Support exposing database port to local client

[paulholden]

Something that can automate the following in a cross-DB compatible manner:

$ git diff
diff --git a/db.mysql.yml b/db.mysql.yml
index 368785f..ccb28af 100644
--- a/db.mysql.yml
+++ b/db.mysql.yml
@@ -17,3 +17,5 @@ services:
       MYSQL_USER: moodle
       MYSQL_PASSWORD: "m@0dl3ing"
       MYSQL_DATABASE: moodle
+    ports:
+      - 127.0.0.1:33066:3306

Which would allow a client to connect to the running database from the host

[scara]

Hi @paulholden,
I'd suggest an approach like the one used for the web port:

moodle-docker/webserver.port.yml

Lines 6 to 7 in cf06e9a

	ports:
	- "${MOODLE_DOCKER_WEB_PORT}:80"

This will help people like me whose Docker Engine is not in the same machine but in another host i.e. 1.2.3.4: and not 127.0.0.1:.

HTH,
Matteo

[skodak]

see #226

[stronk7]

Closing this coz #226 implements it and has landed.

Ciao :-)