move /cards to doorboy-proxy + refactor mongo format

deployment.yaml

@@ -23,12 +23,8 @@ spec:
           env:
             - name: OIDC_USERS_NAMESPACE
               value: "default"
-            - name: SLACK_DOORLOG_CALLBACK
-              value: "changeme"
             - name: SLACK_VERIFICATION_TOKEN
               value: "changeme"
-            - name: INVENTORY_API_KEY
-              value: "sptWL6XFxl4b8"
             - name: PYTHONUNBUFFERED
               value: "1"
             # Google test key