With a standard installation, the authority used to sign certificates generated in the Caddy container is not trusted by your local machine. You must add the authority to the trust store of the host :
# Mac
$ docker cp $(docker compose ps -q php):/data/caddy/pki/authorities/local/root.crt /tmp/root.crt && sudo security add-trusted-cert -d -r trustRoot -k /Library/Keychains/System.keychain /tmp/root.crt
# Linux
$ docker cp $(docker compose ps -q php):/data/caddy/pki/authorities/local/root.crt /usr/local/share/ca-certificates/root.crt && sudo update-ca-certificates
# Windows
$ docker compose cp php:/data/caddy/pki/authorities/local/root.crt %TEMP%/root.crt && certutil -addstore -f "ROOT" %TEMP%/root.crt
By default, Caddy will automatically generate TLS certificates using Let's Encrypt or ZeroSSL. But sometimes you may prefer using custom certificates.
For instance, to use self-signed certificates created with mkcert do as follows:
- Locally install
mkcert
- Create the folder storing the certs:
mkdir frankenphp/certs -p
- Generate the certificates for your local host (example: "server-name.localhost"):
mkcert -cert-file frankenphp/certs/tls.pem -key-file frankenphp/certs/tls.key "server-name.localhost"
- Add these lines to the
./compose.override.yaml
file aboutCADDY_SERVER_EXTRA_DIRECTIVES
environment and volume for thephp
service :php: environment: + CADDY_SERVER_EXTRA_DIRECTIVES: "tls /etc/caddy/certs/tls.pem /etc/caddy/certs/tls.key" # ... volumes: + - ./frankenphp/certs:/etc/caddy/certs:ro - ./public:/app/public:ro
- Restart your
php
service
To disable HTTPS, configure your environment to use HTTP by setting the following variables and starting the project with this command:
SERVER_NAME=http://localhost \
MERCURE_PUBLIC_URL=http://localhost/.well-known/mercure \
docker compose up --pull always -d --wait
Ensure your application is accessible over HTTP by visiting http://localhost
in your web browser.