make root path configurable

server/__init__.py

@@ -17,7 +17,9 @@ mimetypes.init()
 
 logger = get_logger('nacsos.server')
 
-app = FastAPI(openapi_url=settings.SERVER.OPENAPI_FILE)
+app = FastAPI(openapi_url=settings.SERVER.OPENAPI_FILE,
+              openapi_prefix=settings.SERVER.OPENAPI_PREFIX,
+              root_path=settings.SERVER.ROOT_PATH)
 
 logger.debug('Setting up server and middlewares')
 mimetypes.add_type('application/javascript', '.js')

server/util/config.py

@@ -21,6 +21,8 @@ class ServerConfig(BaseModel):
     WORKERS: int = 2  # number of worker processes
     STATIC_FILES: str = '../nacsos-web/dist/'  # path to the static files to be served
     OPENAPI_FILE: str = '/openapi.json'  # absolute URL path to openapi.json file
+    OPENAPI_PREFIX: str = ''  # see https://fastapi.tiangolo.com/advanced/behind-a-proxy/
+    ROOT_PATH: str = ''  # see https://fastapi.tiangolo.com/advanced/behind-a-proxy/
 
     HASH_ALGORITHM: str = 'HS256'
     SECRET_KEY: str = secrets.token_urlsafe(32)