support for runtime configuration

the same docker image need to run in different environments (prod, dev, test, ai-lab, deployai), which means that some parameters will be set at runtime like:

• base url
• credentials for backend services
• authentication method and parameters
• deploy-menu entries
• marketplace default sorting

maybe this link can help: https://totheroot.io/article/runtime-environments-in-angular-and-why-they-matter