script deploy plugged to docGenerator repo + rename doc/ to docs/

Signed-off-by: slumbering <slumbering.pierrot@gmail.com>

docs/install.md

@@ -0,0 +1,76 @@
+# Installing or upgrading Dagger
+
+## Summary
+
+- [Installing or upgrading Dagger](#installing-or-upgrading-dagger)
+  - [Summary](#summary)
+  - [Option 1 (Mac OS only): install or upgrade from Homebrew](#option-1-mac-os-only-install-or-upgrade-from-homebrew)
+  - [Option 2: install or upgrade from a shell script](#option-2-install-or-upgrade-from-a-shell-script)
+  - [Option 3: Manually fetch the latest binary release from Github](#option-3-manually-fetch-the-latest-binary-release-from-github)
+  - [Option 4: Compile from source](#option-4-compile-from-source)
+
+## Option 1 (Mac OS only): install or upgrade from Homebrew
+
+From your Mac OS terminal, run the following command:
+
+```shell
+brew install dagger/tap/dagger
+```
+
+If dagger is already installed, you can upgrade it using this command:
+
+```shell
+brew update; brew upgrade dagger
+```
+
+> :bulb: Verify the installation with `dagger version`.
+
+## Option 2: install or upgrade from a shell script
+
+From a terminal, run the following command:
+
+```shell
+curl -sfL https://releases.dagger.io/dagger/install.sh | sh
+```
+
+You now have the dagger binary in the local directory under `./bin/dagger`.
+
+You can then install it globally on your system:
+
+```shell
+sudo mv ./bin/dagger /usr/local/bin
+```
+
+> :bulb: Verify the installation with `dagger version`.
+
+## Option 3: Manually fetch the latest binary release from Github
+
+Open your web browser to [the latest release](https://github.com/dagger/dagger/releases/latest).
+
+From the **assets** section, download the archive corresponding to your OS and Arch.
+
+> :bulb: Verify the installation with `dagger version`.
+
+## Option 4: Compile from source
+
+You will need [Go](https://golang.org) version 1.16 or later.
+
+1. Clone the dagger repository
+
+```shell
+git clone https://github.com/dagger/dagger.git
+```
+
+2. Build the `dagger` binary.
+
+```shell
+cd dagger; make
+```
+
+3. Copy the `dagger` tool to a location listed in your `$PATH`. For example, to copy it to `/usr/local/bin`:
+
+```shell
+cp ./cmd/dagger/dagger /usr/local/bin
+```
+
+> :bulb: Verify the installation with `dagger version`.