docs: update readme in go impl (#61) (#62)

* docs: update readme in go impl (#61)

Signed-off-by: Luca Stocchi <lstocchi@redhat.com>

* add link to language struct

Signed-off-by: Luca Stocchi <lstocchi@redhat.com>

docs/public/alizer-spec.md

@@ -132,7 +132,7 @@ is discovered, a component is found.
 
 |                                  | Java API | CLI | Javascript | Go |
 |----------------------------------|----------|-----|------------|----|
-| Language/Framework detection     | X        | X   | X          |    |
+| Language/Framework detection     | X        | X   | X          | X  |
 | Devfile detection (metadata)     | X        | X   | X          |    |
 | Devfile detection (registry URL) |          | X   |            |    |
 | Component detection              | X        | X   |            |    |

go/README.md

@@ -0,0 +1,50 @@
+# Alizer
+
+## Summary
+
+Alizer (which stands for Application Analyzer) is a utilily whose goal is to extract information about an application source code. 
+
+This folder includes the GoLang version of it.
+
+## Usage
+
+### Information
+To analyze your source code with Alizer, just import it and use the recognizer:
+
+```
+import "github.com/redhat-developer/alizer/pkg/apis/recognizer"
+
+languages, err := recognizer.Analyze("./")
+```
+
+The result is an ordered list of information for each language detected in the source tree, with the following [data](https://github.com/redhat-developer/alizer/blob/main/go/pkg/apis/language/language.go#L13):
+
+- *Name*: the name of the detected language
+- *Aliases*: other names which identify the detected language
+- *Framework*: a list of detected frameworks (Quarkus, Flash,...) used by the application
+- *Tools*: a list of tools (Maven,...) used by the application
+- *UsageInPercentage*: a double value that represents the language weight compared to the others.
+
+
+## Building it for the first time
+This project includes a Makefile to make you start working with this project smoothly.
+
+To avoid duplicate some configuration files among all implementations we added them to the root of this repo.
+So we first need to copy them withing the go project and then build it so it can embed them.
+
+There are two scripts based on which OS you work with:
+
+Windows
+
+```
+$ make initWin
+```
+
+Linux/Mac
+
+```
+$ make init 
+```
+
+This will copy all needed files in correct location and do a first build.
+From now you can compile your code as you usually do.