Merge pull request #878 from intersystems/doc-install-tar

Update documentation of offline installation

Author: isc-pbarton

README.md

@@ -14,14 +14,13 @@ Embedded Git support for InterSystems platforms, supporting unified source contr
     ```
     zpm "install git-source-control"
     ```
-    To install on an environment without access to the internet, download the tar.gz file from the [releases](https://github.com/intersystems/git-source-control/releases) page. Copy the archive onto a file system the IRIS instance has access to and extract it. Use the package manager to load the release from that directory.
+    To install on an environment without access to the internet, download the tar.gz file from the [releases](https://github.com/intersystems/git-source-control/releases) page. Copy it into a directory accessible to the IRIS instance and use a command in the IRIS terminal to install from the tar.gz file.
     ```
-    tar -xf /path/to/archive/git-source-control-release.tar.gz
-    zpm "load /path/to/archive/git-source-control-release"
+    zpm "load /path/to/archive/git-source-control-release.tar.gz"
     ```
 2. Configure settings by running the following method and answering the prompts:
    ```
-   d ##class(SourceControl.Git.API).Configure()
+   do ##class(SourceControl.Git.API).Configure()
    ```
    This will also allow you to generate an SSH key for use as (e.g.) a deploy key and to initialize or clone a git repo.
 3. If using VSCode: Set up `isfs` server-side editing. First, save your current workspace in which you have the code open. Then, open the `.code-workspace` file generated by VS Code and add the following to the list of folders: