docker files fixes from liaqat

src/Managing.Core/ValueObject.cs

@@ -0,0 +1,40 @@
+namespace Managing.Core
+{
+    public abstract class ValueObject
+    {
+        protected static bool EqualOperator(ValueObject left, ValueObject right)
+        {
+            if (ReferenceEquals(left, null) ^ ReferenceEquals(right, null))
+            {
+                return false;
+            }
+            return ReferenceEquals(left, null) || left.Equals(right);
+        }
+
+        protected static bool NotEqualOperator(ValueObject left, ValueObject right)
+        {
+            return !(EqualOperator(left, right));
+        }
+
+        protected abstract IEnumerable<object> GetEqualityComponents();
+
+        public override bool Equals(object obj)
+        {
+            if (obj == null || obj.GetType() != GetType())
+            {
+                return false;
+            }
+
+            var other = (ValueObject)obj;
+
+            return this.GetEqualityComponents().SequenceEqual(other.GetEqualityComponents());
+        }
+
+        public override int GetHashCode()
+        {
+            return GetEqualityComponents()
+                .Select(x => x != null ? x.GetHashCode() : 0)
+                .Aggregate((x, y) => x ^ y);
+        }
+    }
+}