docs: update manual installation instructions and usage examples

- Added commands for using specific Dokploy versions with curl and bash, enhancing clarity on installation options.
- Updated the install.sh script comments to reflect new usage instructions for setting the DOKPLOY_VERSION environment variable.

Author: Siumauricio

apps/docs/content/docs/core/manual-installation.mdx

@@ -292,3 +292,17 @@ To upgrade Dokploy manually, you can use the following command:
 curl -sSL https://dokploy.com/install.sh | sh -s update
 ```
 
+To use a specific version, you can use the following command:
+
+```bash
+export DOKPLOY_VERSION=canary && curl -sSL https://dokploy.com/install.sh | sh
+export DOKPLOY_VERSION=feature && curl -sSL https://dokploy.com/install.sh | sh
+curl -sSL https://dokploy.com/install.sh | sh (defaults to latest)
+```
+
+Alternatively, you can use `bash -s`:
+
+```bash
+DOKPLOY_VERSION=canary bash -s < <(curl -sSL https://dokploy.com/install.sh)
+DOKPLOY_VERSION=feature bash -s < <(curl -sSL https://dokploy.com/install.sh)
+```

apps/website/public/install.sh

@@ -1,9 +1,13 @@
 #!/bin/bash
 
 # Detect version from environment variable or default to latest
-# Usage: DOKPLOY_VERSION=canary bash install.sh
-# Usage: DOKPLOY_VERSION=feature bash install.sh
-# Usage: bash install.sh (defaults to latest)
+# Usage with curl (export first): export DOKPLOY_VERSION=canary && curl -sSL https://dokploy.com/install.sh | sh
+# Usage with curl (export first): export DOKPLOY_VERSION=feature && curl -sSL https://dokploy.com/install.sh | sh
+# Usage with curl (bash -s): DOKPLOY_VERSION=canary bash -s < <(curl -sSL https://dokploy.com/install.sh)
+# Usage with curl (default): curl -sSL https://dokploy.com/install.sh | sh (defaults to latest)
+# Usage with bash: DOKPLOY_VERSION=canary bash install.sh
+# Usage with bash: DOKPLOY_VERSION=feature bash install.sh
+# Usage with bash: bash install.sh (defaults to latest)
 detect_version() {
     local version="${DOKPLOY_VERSION:-latest}"
     echo "$version"