1. The problem I’m having:
Hi all!
I’m currently building my first docker stack with caddy (we want to replace nginx here 
). But I’m facing a strange issue:
Chrome is giving me a ERR_SSL_PROTOCOL_ERROR without proposing to accept any self signed cert.
2. Error messages and/or full log output:
Main main error is that I’m receiving a code: ERR_SSL_PROTOCOL_ERROR.
Here is the full logs of the starting server:
container-caddy-1 | {"level":"info","ts":1678457618.401892,"msg":"using provided configuration","config_file":"/etc/caddy/Caddyfile","config_adapter":"caddyfile"}
container-caddy-1 | {"level":"warn","ts":1678457618.4046283,"msg":"Caddyfile input is not formatted; run the 'caddy fmt' command to fix inconsistencies","adapter":"caddyfile","file":"/etc/caddy/Caddyfile","line":5}
container-caddy-1 | {"level":"info","ts":1678457618.406586,"logger":"admin","msg":"admin endpoint started","address":"localhost:2019","enforce_origin":false,"origins":["//127.0.0.1:2019","//localhost:2019","//[::1]:2019"]}
container-caddy-1 | {"level":"info","ts":1678457618.407156,"logger":"http","msg":"server is listening only on the HTTPS port but has no TLS connection policies; adding one to enable TLS","server_name":"srv0","https_port":443}
container-caddy-1 | {"level":"info","ts":1678457618.4074059,"logger":"http","msg":"enabling automatic HTTP->HTTPS redirects","server_name":"srv0"}
container-caddy-1 | {"level":"info","ts":1678457618.4073477,"logger":"tls.cache.maintenance","msg":"started background certificate maintenance","cache":"0x4000206e70"}
container-caddy-1 | {"level":"info","ts":1678457618.4080667,"logger":"http","msg":"enabling HTTP/3 listener","addr":":443"}
container-caddy-1 | {"level":"info","ts":1678457618.4081972,"msg":"failed to sufficiently increase receive buffer size (was: 208 kiB, wanted: 2048 kiB, got: 416 kiB). See https://github.com/quic-go/quic-go/wiki/UDP-Receive-Buffer-Size for details."}
container-caddy-1 | {"level":"info","ts":1678457618.408458,"logger":"http.log","msg":"server running","name":"srv0","protocols":["h1","h2","h3"]}
container-caddy-1 | {"level":"info","ts":1678457618.4085166,"logger":"http.log","msg":"server running","name":"remaining_auto_https_redirects","protocols":["h1","h2","h3"]}
container-caddy-1 | {"level":"info","ts":1678457618.408758,"msg":"autosaved config (load with --resume flag)","file":"/config/caddy/autosave.json"}
container-caddy-1 | {"level":"info","ts":1678457618.4088247,"msg":"serving initial configuration"}
container-caddy-1 | {"level":"info","ts":1678457618.409076,"logger":"tls","msg":"cleaning storage unit","description":"FileStorage:/data/caddy"}
container-caddy-1 | {"level":"info","ts":1678457618.4094574,"logger":"tls","msg":"finished cleaning storage units"}
3. Caddy version:
2.6.4
4. How I installed and ran Caddy:
I ran Caddy through docker with this files architecture:
a. System environment:
Here is my docker-compose.yml:
version: '3.1'
services:
redis:
image: 'redis:alpine'
mysql:
image: 'mysql:8.0'
working_dir: /application
volumes:
- '.:/application'
environment:
- SOME VARS...
ports:
- '6002:3306'
php-fpm:
build: phpdocker/php-fpm
working_dir: /application
volumes:
- '.:/application'
- './phpdocker/php-fpm/php-ini-overrides.ini:/etc/php/8.2/fpm/conf.d/99-overrides.ini'
phpmyadmin:
image: phpmyadmin/phpmyadmin
container_name: phpmyadmin
ports:
- "6089:80"
depends_on:
- mysql
environment:
- SOME VARS...
caddy:
image: caddy:2.6.4-alpine
environment:
SERVER_NAME: "OBFUSCATE"
restart: unless-stopped
ports:
# HTTP
- target: 80
published: 80
protocol: tcp
# HTTPS
- target: 443
published: 443
protocol: tcp
# HTTP/3
- target: 443
published: 443
protocol: udp
volumes:
- ./phpdocker/caddy/Caddyfile:/etc/caddy/Caddyfile
- ./app:/srv
- caddy_data:/data
- caddy_config:/config
depends_on:
- php-fpm
volumes:
caddy_data:
caddy_config:
d. My complete Caddy config:
{
}
:443 {
root * /srv/public
encode gzip
php_fastcgi unix//var/run/php/php-fpm.sock
file_server
}
I don’t understand why it’s not proposing me to accept the self generated cert 
Could you help me pls?
