Remote communication broken since v0.3.0 when using Grafana on non-root path

[sberlin]

Since v0.3.0 Grizzly is broken for us. We receive differing error messages when using commands like pull or apply. A selection of those errors:

/src # grr pull -d foo
Flag --directory has been deprecated, now it is inferred from the operating system
INFO[0000] Pulling resources to foo
FATA[0000] [GET /v1/provisioning/alert-rules] GetAlertRules (status 404): {}
/src # grr pull -d foo
Flag --directory has been deprecated, now it is inferred from the operating system
INFO[0000] Pulling resources to foo
FATA[0000] [GET /v1/provisioning/alert-rules] GetAlertRules (status 404): {}
/src # grr pull -d foo
Flag --directory has been deprecated, now it is inferred from the operating system
INFO[0000] Pulling resources to foo
FATA[0000] [GET /v1/provisioning/alert-rules] GetAlertRules (status 404): {}
FATA[0000] &{ <nil> } (*models.ErrorResponseBody) is not supported by the TextConsumer, can be resolved by supporting TextUnmarshaler interface

Connection is setup with

/src # export GRAFANA_URL=http://localhost:8080/grafana
/src # export GRAFANA_TOKEN=foo
/src # grr config import # optionally

When running a webserver at that address, I receive the following

docker run --rm -p 8080:8080 -v "$PWD:/app:z" -u "$(id -u):0" bitnami/nginx:latest
[...]
2024/01/31 15:16:32 [error] 39#39: *11 open() "/opt/bitnami/nginx/html/api/search" failed (2: No such file or directory), client: 10.0.2.100, server: , request: "GET /api/search?limit=1000&page=1&type=dash-folder HTTP/1.1", host: "192.168.178.20:8080"
10.0.2.100 - - [31/Jan/2024:15:16:32 +0000] "GET /api/search?limit=1000&page=1&type=dash-folder HTTP/1.1" 404 117 "-" "Go-http-client/1.1" "-"
2024/01/31 15:19:57 [error] 39#39: *12 open() "/opt/bitnami/nginx/html/api/v1/provisioning/alert-rules" failed (13: Permission denied), client: 10.0.2.100, server: , request: "GET /api/v1/provisioning/alert-rules HTTP/1.1", host: "192.168.178.20:8080"
10.0.2.100 - - [31/Jan/2024:15:19:57 +0000] "GET /api/v1/provisioning/alert-rules HTTP/1.1" 403 117 "-" "Go-http-client/1.1" "-"
2024/01/31 15:19:59 [error] 39#39: *13 open() "/opt/bitnami/nginx/html/api/datasources" failed (13: Permission denied), client: 10.0.2.100, server: , request: "GET /api/datasources HTTP/1.1", host: "192.168.178.20:8080"
10.0.2.100 - - [31/Jan/2024:15:19:59 +0000] "GET /api/datasources HTTP/1.1" 403 117 "-" "Go-http-client/1.1" "-"

Note that the root context /grafana is missing. We're going back to v0.2.0 now.