feature: Docker OAuth block support (via #4987)

* add `onFound` callback to schemas
* add warning to method docs (for #4957)
* implement Docker OAuth2 init block support
* update docs
* add OAUTH_SCOPE_SEPARATOR
* drop OAuth env from Dockerfile and run script
* don't indent the first oauth block line
* drop unused `dedent` import
* touch up warning message
* add more test cases
* return an empty block if no OAuth content is generated
* fix broken doc line

docker/configurator/translator.js

@@ -55,6 +55,10 @@ function objectToKeyValueString(env, { injectBaseConfig = false, schema = config
     
     if(!varSchema) return
 
+    if(varSchema.onFound) {
+      varSchema.onFound()
+    }
+
     const storageContents = valueStorage[varSchema.name]
 
     if(storageContents) {