Providing configuration via Docker

[shockey]

Expected Behavior

I should be able to set any UI configuration option when using the Docker image.

Current Behavior

Some Docker ENV=>config mappings exist, but they are arbitrarily chosen and can only accept string values.

Possible Solution

Expose a CONFIG_JSON env variable that is parsed and applied, resulting in something like CONFIG_JSON='{"docExpansion": "none"}'.

• More robust, but harder to deal with in practice.
• Writing JSON by hand is a pain, OTOH it's a nice solution for automated uses.

Create 1:1 env<>option bindings, resulting in something like DOC_EXPANSION=none.

• Prettier, but requires careful upkeep when new options are added.
• Only allows string values, unless we get very clever. And clever tends to break.

Or..... both?

Context

Inspired by swagger-api/swagger-editor#1546.

[gaba-xyz]

Any update for this? #4044 is a nice improvement but would be great if other configuration parameters could be passed as well