Start time configuration can be achieved using

Configuring Spring-Boot applications using environment variables is probably the most common case and is the default choice in a container based environment. With Docker you simply add each environment variable on the command-line or pass in a path to a file with the environment variables. With Spring environment variables are defined in upper case and transformed by Spring to the java properties syntax.

To pass in environment variables use the -e or the --env-file options.

Passing environment variables on the command-line. 

docker run \
 -e REPOSITORY_URL=http://my-host:40180/ior coremedia/cae-preview

Configuring the application by mounting a configuration file should only be used if passing variables in does not work or if replacing an existing configuration file is desired. To mount a file into the container, the path to the file or directory on the host and in the container must be defined. I.e.

Mounting configuration files. 

docker run \
 -v $PWD/override.properties:/coremedia/config/application.properties \
 coremedia/cae-live