Configure a prefix in the routes

[Sevi7]

Feature Description

Add a new environment variable to set a prefix in the routes. I would like to prefix the routes with /bitgo for example so /api/v2/pingexpress would become /bitgo/api/v2/pingexpress.

Motivation

The need arises because I am sharing AWS Load Balancers between different services and the prefix is the one routing requests to the corresponding service. So the service would need to accept the prefix before its routes.

Context

[mmcshinsky-bitgo]

Hi @Sevi7. You should be able to set this by using the environmental key BITGO_CUSTOM_ROOT_URI.

BITGO_CUSTOM_ROOT_URI=example.com/bitgo

Result:
example.com/bitgo/api/v2...

[Sevi7]

Hi @mmcshinsky-bitgo thanks for your quick reply. I had already tried with
BITGO_CUSTOM_ROOT_URI=https://0.0.0.0:3080/bitgo
but the result was:

customRootUri or customBitcoinNetwork is set, but env is 'test'. Setting env to 'custom'.
Environment: custom
BitGo-Express running
Custom root URI: https://0.0.0.0:3080/bitgo
Base URI: https://0.0.0.0:3080
error 404: bitgo-express can only proxy BitGo API requests
1.0.78.237 - local_express [14/Sep/2022:19:18:37 +0000] "GET /bitgo/api/v2/pingexpress HTTP/1.1" 404 176 "-" "PostmanRuntime/7.29.2"
failed to fetch initial client constants from BitGo

As you can see in GET /bitgo/api/v2/pingexpress /bitgo/ prefix still appears. I don't know if I'm configuring something wrong.