refactor: move logStdout/corsPolicy to Middleware

* remove configQuiet from Config

configQuiet was not an end user setting.
The logging setup is now an internal parameter.

* move proxy uri validation to Private dir

test/Main.hs

@@ -15,7 +15,7 @@ import Test.Hspec
 import PostgREST.App         (postgrest)
 import PostgREST.Config      (AppConfig (..))
 import PostgREST.DbStructure (getDbStructure, getPgVersion)
-import PostgREST.Types       (pgVersion95, pgVersion96)
+import PostgREST.Types       (LogSetup (..), pgVersion95, pgVersion96)
 import Protolude             hiding (toList, toS)
 import Protolude.Conv        (toS)
 import SpecHelper
@@ -65,12 +65,12 @@ main = do
 
   let
     -- For tests that run with the same refDbStructure
-    app cfg = return ((), postgrest (cfg testDbConn) refDbStructure pool getTime $ pure ())
+    app cfg = return ((), postgrest LogQuiet (cfg testDbConn) refDbStructure pool getTime $ pure ())
 
     -- For tests that run with a different DbStructure(depends on configSchemas)
     appDbs cfg = do
       dbs <- (newIORef . Just) =<< setupDbStructure pool (configSchemas $ cfg testDbConn) actualPgVersion
-      return ((), postgrest (cfg testDbConn) dbs pool getTime $ pure ())
+      return ((), postgrest LogQuiet (cfg testDbConn) dbs pool getTime $ pure ())
 
   let withApp              = app testCfg
       maxRowsApp           = app testMaxRowsCfg