anchor.diff:    copyToBuildDir "./src/FsTweet.Web/assets" "assets"
   )
   
  +let swapConnectionString (oldValue: string) (newValue : string) =
  +  let dbFilePath = "./src/FsTweet.Web/Db.fs"
  +  let dbFileContent = File.ReadAllText dbFilePath
  +  let newDbFileContent = dbFileContent.Replace(oldValue, newValue)
  +  File.WriteAllText(dbFilePath, newDbFileContent)
  +
  +Target "ReplaceDbConnStringForBuild" (fun _ -> 
  +  swapConnectionString localDbConnString connString
  +)
  +Target "RevertDbConnStringChange" (fun _ -> 
  +  swapConnectionString connString localDbConnString
  +)
  +
   // Build order
   "Clean"
   ==> "BuildMigrations"
   ==> "RunMigrations"
  +==> "ReplaceDbConnStringForBuild"
   ==> "Build"
  +==> "RevertDbConnStringChange"
   ==> "Views"
   ==> "Assets"
   ==> "Run"
  
positive.code:   |> MSBuildDebug buildDir "Build" 
    |> Log "MigrationBuild-Output: "
  )
  
  let connString = 
    environVarOrDefault 
      "FSTWEET_DB_CONN_STRING"
      @"Server=127.0.0.1;Port=5432;Database=FsTweet;User Id=postgres;Password=test;"
  
  setEnvironVar "FSTWEET_DB_CONN_STRING" connString
  let dbConnection = ConnectionString (connString, DatabaseProvider.PostgreSQL)
  
negative.code: 
  open Fake
  open Fake.FluentMigratorHelper
  open System.IO
  
  // Directories
  let buildDir  = "./build/"
  