Documents supported environment variables

Author: c4milo

README.md

@@ -6,25 +6,37 @@ Yet another Github release command line tool. This one, though, is much more min
 Github command line release tool.
 
 Usage:
-  github-release <user/repo> <tag> <branch> <description> <files>
+	github-release <user/repo> <tag> <branch> <description> <files>
 
 Parameters:
-  <user/repo>: Github user and repository
-  <tag>: Used to created the release. It is also used as the release's name
-  <branch>: Reference from where to create the provided <tag>, if it does not exist
-  <description>: The release description
-  <files>: Glob pattern describing the list of files to include in the release
+	<user/repo>: Github user and repository
+	<tag>: Used to created the release. It is also used as the release's name
+	<branch>: Reference from where to create the provided <tag>, if it does not exist
+	<description>: The release description
+	<files>: Glob pattern describing the list of files to include in the release
 
 Options:
-  -version: Displays version
+	-version: Displays version
+
+Environment variables:
+  DEBUG: Allows you to run github-release in debugging mode. DO NOT do this if you are attempting to upload big files.
+  GITHUB_TOKEN: Must be set in order to interact with Github's API
+  GITHUB_USER: Just in case you want an alternative way of providing your github user
+  GITHUB_REPO: Just in case you want an alternative way of providing your github repo
+  GITHUB_API: Github API endpoint. Set to https://api.github.com/repos/:github-user/:github-repo" by default
 
 Before using this tool make sure you set the environment variable GITHUB_TOKEN
 with a valid Github token and correct authorization scopes to allow you to create releases
 in your project. For more information about creating Github tokens please read the
 official Github documentation at https://help.github.com/articles/creating-an-access-token-for-command-line-use/
+
+Author: https://github.com/c4milo
+License: http://mozilla.org/MPL/2.0/
+
 ```
 
 ### Examples
 Feel free to inspect this project's [Makefile](https://github.com/c4milo/github-release/blob/master/Makefile) for an example on how this tool can be used to create releases like this:
 
 ![](https://cldup.com/lTTZG_KQXI.png)
+ 

main.go

@@ -71,11 +71,20 @@ Parameters:
 Options:
 	-version: Displays version
 
+Environment variables:
+  DEBUG: Allows you to run github-release in debugging mode. DO NOT do this if you are attempting to upload big files.
+  GITHUB_TOKEN: Must be set in order to interact with Github's API
+  GITHUB_USER: Just in case you want an alternative way of providing your github user
+  GITHUB_REPO: Just in case you want an alternative way of providing your github repo
+  GITHUB_API: Github API endpoint. Set to https://api.github.com/repos/:github-user/:github-repo" by default
+
 Before using this tool make sure you set the environment variable GITHUB_TOKEN
 with a valid Github token and correct authorization scopes to allow you to create releases
 in your project. For more information about creating Github tokens please read the 
 official Github documentation at https://help.github.com/articles/creating-an-access-token-for-command-line-use/
 
+Author: https://github.com/c4milo
+License: http://mozilla.org/MPL/2.0/
 `
 
 func main() {