Error: MONGO_URL must be set in environment

[SpacialDrift]

I get this constantly in my logs and the docker container will not start. Any help/advise is appreciated.

`=> Starting meteor app on port:80

/built_app/programs/server/node_modules/fibers/future.js:245
throw(ex);
^
Error: MONGO_URL must be set in environment
at Object. (packages/mongo/remote_collection_driver.js:36:1)
at Object.defaultRemoteCollectionDriver (packages/underscore/underscore.js:750:1)
at new Mongo.Collection (packages/mongo/collection.js:102:1)
at AccountsServer.AccountsCommon (accounts_common.js:23:18)
at new AccountsServer (accounts_server.js:16:5)
at Package (globals_server.js:5:12)
at /built_app/programs/server/packages/accounts-base.js:1814:4
at /built_app/programs/server/packages/accounts-base.js:1825:3
at /built_app/programs/server/boot.js:242:10
at Array.forEach (native)
`

This is inside a docker build running on a Synology DSM.

[bram-pkg]

You need to set the MONGO_URL environment variable to point to your MongoDB server.

Check this file for an example: https://github.com/lokenx/plexrequests-meteor/blob/master/docker-compose.yml