feat: implemented environment util

api/src/main/java/ru/dragonestia/msb3/api/util/Env.java

@@ -0,0 +1,21 @@
+package ru.dragonestia.msb3.api.util;
+
+import lombok.experimental.UtilityClass;
+
+import java.util.Optional;
+
+@UtilityClass
+public class Env {
+
+    public Optional<String> string(String key) {
+        return Optional.ofNullable(System.getenv(key));
+    }
+
+    public Optional<Integer> integer(String key) {
+        return Optional.ofNullable(System.getenv(key)).map(Integer::parseInt);
+    }
+
+    public Optional<Boolean> bool(String key) {
+        return Optional.ofNullable(System.getenv(key)).map(Boolean::parseBoolean);
+    }
+}