Added README.md for roles

Signed-off-by: Tuan-Dat Tran <tuan-dat.tran@tudattr.dev>

roles/reverse_proxy/README.md

@@ -0,0 +1,58 @@
+# Ansible Role: Reverse Proxy
+
+This role installs and configures Caddy as a reverse proxy.
+
+## Role Variables
+
+### `defaults/main.yml`
+
+- `caddy_binary_url`: The URL to download the Caddy binary.
+- `caddy_binary_path`: The path to install the Caddy binary.
+- `caddy_user`: The user to run Caddy as.
+- `caddy_group`: The group to run Caddy as.
+- `caddy_config_path`: The path to the Caddy configuration file.
+- `caddy_log_path`: The path to the Caddy log file.
+- `caddy_systemd_service_path`: The path to the Caddy systemd service file.
+- `caddy_systemd_service_name`: The name of the Caddy systemd service.
+- `caddy_version`: The version of Caddy to install.
+- `xcaddy_version`: The version of xcaddy to install.
+- `go_version`: The version of Go to install.
+- `go_download_url`: The URL to download Go from.
+- `go_install_dir`: The directory to install Go to.
+- `caddy_custom_plugins`: A list of custom plugins to install with Caddy.
+- `netcup_customer_id`: Your Netcup customer ID.
+- `netcup_api_key`: Your Netcup API key.
+- `netcup_api_password`: Your Netcup API password.
+
+### `vars/main.yml`
+
+- `caddy_email`: The email address to use for Let's Encrypt.
+- `caddy_domains`: A list of domains to configure for the reverse proxy.
+
+## Handlers
+
+- `restart caddy`: Restarts the Caddy service.
+
+## Tasks
+
+### `main.yml`
+
+- `00_go_install.yml`: Installs Go.
+- `10_caddy_install.yml`: Installs Caddy.
+- `20_xcaddy_install.yml`: Installs xcaddy.
+- `30_custom_caddy.yml`: Builds a custom Caddy binary with plugins.
+- `50_netcup_dns.yml`: Configures Netcup DNS for Caddy.
+- `80_configure.yml`: Configures Caddy.
+
+## Usage
+
+```yaml
+- hosts: servers
+  roles:
+    - role: reverse_proxy
+      vars:
+        caddy_email: "user@example.com"
+        caddy_domains:
+          - domain: "example.com"
+            proxy: "http://localhost:8080"
+```