Remove trailing slashes (/) from root_path

Author: CasperWA

optimade/server/config.py

@@ -146,6 +146,14 @@ def set_implementation_version(cls, v):
         res.update(v)
         return res
 
+    @validator("root_path", pre=False)
+    def remove_end_slashes(cls, value: str) -> str:
+        """Remove ending slashes from root_path"""
+        if isinstance(value, str):
+            while value.endswith("/"):
+                value = value[:-1]
+        return value
+
     @root_validator(pre=True)
     def load_settings(cls, values):
         """