Standardize '/version' endpoint on all services (#1755)

src/Api/Controllers/InfoController.cs

@@ -0,0 +1,38 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Microsoft.AspNetCore.Mvc;
+using Bit.Core.Utilities;
+
+namespace Bit.Api.Controllers
+{
+    public class InfoController : Controller
+    {
+        [HttpGet("~/alive")]
+        [HttpGet("~/now")]
+        public DateTime GetAlive()
+        {
+            return DateTime.UtcNow;
+        }
+
+        [HttpGet("~/version")]
+        public JsonResult GetVersion()
+        {
+            return Json(CoreHelpers.GetVersion());
+        }
+        
+        [HttpGet("~/ip")]
+        public JsonResult Ip()
+        {
+            var headerSet = new HashSet<string> { "x-forwarded-for", "cf-connecting-ip", "client-ip" };
+            var headers = HttpContext.Request?.Headers
+                .Where(h => headerSet.Contains(h.Key.ToLower()))
+                .ToDictionary(h => h.Key);
+            return new JsonResult(new
+            {
+                Ip = HttpContext.Connection?.RemoteIpAddress?.ToString(),
+                Headers = headers,
+            });
+        }
+    }
+}