fix: Fix envValue behavior

Author: Romakita

package.json

@@ -17,7 +17,7 @@
   },
   "repository": {
     "type": "git",
-    "url": "http://github.com/romakita/json-properties"
+    "url": "https://github.com/romakita/json-properties.git"
   },
   "keywords": [
     "ts",

readme.md

@@ -105,12 +105,32 @@ export class Foo {
 
         //or with Properties Api
 
-        console.log('wsdl', Properties.getValue('wsdl')); // wsdl => {"wsdl1":"..."}
+        console.log('wsdl', Properties.get('wsdl')); // wsdl => {"wsdl1":"..."}
     }
 }
 ```
+> **Note** : All properties returned by `@Value` or `Properties.getValue` are **immutable**.
 
-**Note** : All properties returned by `@Value` or `Properties.getValue` are **immutable**.
+
+### From Env
+
+Define your env variable:
+
+```bash
+export path__to__var = "1000"
+```
+
+Then use `@EnvValue`:
+
+```typescript
+import {Value, Properties} from 'ts-json-properties';
+
+export class Foo {
+    @EventValue('path.to.var')
+    private documents1: string; 
+}
+```
+> Note: if the env value is undefined, the value will be retrieved from properties.json 
 
 ## Test
 

src/decorators/envValue.ts

@@ -1,4 +1,3 @@
-import {parse} from "../utils/parse";
 import {Properties} from "../utils/Properties";
 
 export function EnvValue(expression: string, defaultValue?: any) {
@@ -7,7 +6,7 @@ export function EnvValue(expression: string, defaultValue?: any) {
 
         if (delete target[propertyKey]) {
 
-            let value = parse(expression, process.env);
+            let value = process.env[expression.replace(/\./gi, "__")];
 
             Object.defineProperty(target, propertyKey, {