Dockerize using caddy and php-fpm

Caddyfile

@@ -0,0 +1,8 @@
+:80 {
+	root * /srv
+	encode gzip zstd
+	php_fastcgi php-fpm:9000
+	file_server
+	# Force route through index.php
+	try_files {path} /index.php{path}
+}

README.md

@@ -45,8 +45,11 @@ This router is dependency-free. The only composer packages installed are
 [PHPStan](https://phpstan.org) and [PHPUnit](https://phpunit.de), for static
 code analysis and unit testing. Remove with
 
-```zsh
+```bash
+# Remove composer things
 rm -rf vendor/ composer* .phpstan.neon .vscode/tasks.json
+# Remove docker things
+rm docker-compose.yml Caddyfile
 ```
 
 and remove the autoloader from the `index.php` file.

docker-compose.yml

@@ -0,0 +1,17 @@
+version: '3'
+
+services:
+  caddy:
+    image: caddy:2-alpine
+    restart: unless-stopped
+    ports:
+      - 80:80
+      - 443:443
+    volumes:
+      - ./Caddyfile:/etc/caddy/Caddyfile
+      - ./src:/srv
+
+  php-fpm:
+    image: php:8.2-fpm-alpine
+    volumes:
+      - ./src:/srv