Not working on circleCI

[garak]

Hello,
I'm trying to setup CircleCI for a project using Mercure.
Note that I'm using CircleCI for other projects without any problems and that this particular project is working in my local environment (using Docker).
Despite having configurated CircleCI with same variables as my local Docker (that, again, is working), I'm getting an error during build:

2020/12/09 14:35:10 WARNING: proto: file "pb.proto" is already registered
A future release will panic on registration conflicts. See:
https://developers.google.com/protocol-buffers/docs/reference/go/faq#namespace-conflict

2020/12/09 14:35:10.143	INFO	using provided configuration	{"config_file": "/etc/caddy/Caddyfile", "config_adapter": "caddyfile"}
2020/12/09 14:35:10.144	INFO	admin	admin endpoint started	{"address": "tcp/localhost:2019", "enforce_origin": false, "origins": ["localhost:2019", "[::1]:2019", "127.0.0.1:2019"]}
2020/12/09 14:35:10.145	INFO	http	server is listening only on the HTTP port, so no automatic HTTPS will be applied to this server	{"server_name": "srv0", "http_port": 80}
2020/12/09 14:35:10.145	INFO	tls.cache.maintenance	started background certificate maintenance	{"cache": "0xc0003ef420"}
2020/12/09 14:35:10.146	DEBUG	http	starting server loop	{"address": "[::]:80", "http3": true, "tls": false}
2020/12/09 14:35:10.146	INFO	tls	cleaned up storage units
2020/12/09 14:35:10.146	INFO	autosaved config	{"file": "/config/caddy/autosave.json"}
2020/12/09 14:35:10.146	INFO	serving initial configuration
2020/12/09 14:37:08.898	INFO	http.handlers.mercure	Topic selectors not matched or not provided	{"remote_addr": "127.0.0.1:60678", "error": "unable to parse JWT: signature is invalid"}
2020/12/09 14:37:08.898	ERROR	http.log.access	handled request	{"request": {"remote_addr": "127.0.0.1:60678", "proto": "HTTP/1.1", "method": "POST", "host": "127.0.0.1", "uri": "/.well-known/mercure", "headers": {"Content-Length": ["346"], "Content-Type": ["application/x-www-form-urlencoded"], "Accept": ["*/*"], "Authorization": ["Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJtZXJjdXJlIjp7InN1YnNjcmliZSI6W10sInB1Ymxpc2giOlsiKiJdfX0.bJBbdEZzQ7XMM8b2jDGWLEK8Rf7l3vaewdZE4ClKArE"], "User-Agent": ["Symfony HttpClient/Curl"], "Accept-Encoding": ["gzip"]}}, "common_log": "127.0.0.1 - - [09/Dec/2020:14:37:08 +0000] \"POST /.well-known/mercure HTTP/1.1\" 401 13", "duration": 0.000299473, "size": 13, "status": 401, "resp_headers": {"X-Content-Type-Options": ["nosniff"], "X-Xss-Protection": ["1; mode=block"], "Content-Security-Policy": ["default-src 'self' mercure.rocks cdn.jsdelivr.net"], "Content-Type": ["text/plain; charset=utf-8"], "Server": ["Caddy"], "X-Frame-Options": ["DENY"]}}
2020/12/09 14:37:09.140	INFO	http.handlers.mercure	Topic selectors not matched or not provided	{"remote_addr": "127.0.0.1:60680", "error": "unable to parse JWT: signature is invalid"}
2020/12/09 14:37:09.140	ERROR	http.log.access	handled request	{"request": {"remote_addr": "127.0.0.1:60680", "proto": "HTTP/1.1", "method": "POST", "host": "127.0.0.1", "uri": "/.well-known/mercure", "headers": {"Accept": ["*/*"], "Authorization": ["Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJtZXJjdXJlIjp7InN1YnNjcmliZSI6W10sInB1Ymxpc2giOlsiKiJdfX0.bJBbdEZzQ7XMM8b2jDGWLEK8Rf7l3vaewdZE4ClKArE"], "User-Agent": ["Symfony HttpClient/Curl"], "Accept-Encoding": ["gzip"], "Content-Length": ["356"], "Content-Type": ["application/x-www-form-urlencoded"]}}, "common_log": "127.0.0.1 - - [09/Dec/2020:14:37:09 +0000] \"POST /.well-known/mercure HTTP/1.1\" 401 13", "duration": 0.000210674, "size": 13, "status": 401, "resp_headers": {"Server": ["Caddy"], "Content-Security-Policy": ["default-src 'self' mercure.rocks cdn.jsdelivr.net"], "X-Frame-Options": ["DENY"], "X-Content-Type-Options": ["nosniff"], "X-Xss-Protection": ["1; mode=block"], "Content-Type": ["text/plain; charset=utf-8"]}}


Build was canceled

The only point I changed compared to my local Docker env is the value for mercure URL, that is mercure in local (being "mercure" the name of my docker image) and 127.0.0.1 in CircleCI (just a wild guess, I've no idea of what to put here. Since I'm using 127.0.0.1 for MySQL connection, I guess I can use it for Mercure as well)

Any help is appreciated.