README: add installation instructions

README.md

@@ -3,12 +3,58 @@ staticd
 
 Download statically linked binaries from GitHub.
 
+## Install
+
+To install `staticd`, go to the [releases page][releases] and follow the instructions below:
+
+- Download the binary for your OS and architecture.
+- Make the binary executable:
+
+  ```
+  chmod +x staticd-<os>-<arch>
+  ```
+
+From there, you can either opt for the home directory installation (recommended) or the system-wide installation.
+
+### Home-based installation
+
+- Create the `~/.local/bin` directory if it does not exist:
+  ```
+  mkdir -p ~/.local/bin
+  ```
+
+- Move the binary to `~/.local/bin`:
+  ```
+  mv staticd-<os>-<arch> ~/.local/bin/staticd
+  ```
+
+- Ensure `$HOME/.local/bin` is in your `$PATH`. Add the following line to your `~/.bashrc` or equivalent shell configuration file:
+  ```
+  export PATH="$HOME/.local/bin:$PATH"
+  ```
+
+  P.s.: use `$HOME` instead of `~/` as [tilde does not expand in quotes][SC2088].
+
+### System-wide installation
+
+- Move the binary to `/usr/local/bin`:
+  ```
+  sudo mv staticd-<os>-<arch> /usr/local/bin/staticd
+  ```
+
+After installation, you can run the tool by calling the `staticd` command.
+
 ## Usage
 
 ```
 $ staticd <tool>
 ```
 
+It's important to note that:
+
+- Calling it directly as a non-root user puts the binaries into `~/.local/bin`.
+- Calling it using `sudo` puts the binaries into `/usr/local/bin`.
+
 ## Tools
 
 - `bat`: [sharkdp/bat][bat], a cat(1) clone with wings.
@@ -30,7 +76,9 @@ $ staticd <tool>
 [flyctl]: https://github.com/superfly/flyctl
 [k9s]: https://github.com/derailed/k9s
 [kubectx]: https://github.com/ahmetb/kubectx
+[releases]: https://github.com/myhro/staticd/releases
 [rg]: https://github.com/BurntSushi/ripgrep
+[SC2088]: https://www.shellcheck.net/wiki/SC2088
 [shellcheck]: https://github.com/koalaman/shellcheck
 [upx]: https://github.com/upx/upx
 [uv]: https://github.com/astral-sh/uv