Improve the web-viewer.

reanimate.cabal

@@ -28,17 +28,32 @@ library
   build-depends:       base >=4.10 && <4.13,
                        lucid-svg, time, text, unix, lucid, filepath, process, directory,
                        containers, svg-tree >= 0.6.2.3, xml, bytestring, lens, linear, mtl, matrix,
-                       JuicyPixels, attoparsec
+                       JuicyPixels, attoparsec, parallel
 
 Flag gtk-viewer
   Description: Enable gtk-based viewer
-  Default:     True
+  Default:     False
+
+Flag server
+  Description: Enable rendering server
+  Default:     False
+
+executable reanimate-server
+  if flag(server)
+    buildable:        True
+  else
+    buildable:        False
+  hs-source-dirs:     server, src
+  main-is:            Main.hs
+  other-modules:      Reanimate.Misc
+  build-depends:      base >=4.10 && <4.13, text, websockets, process, filepath, directory,
+                      cache, clock, stm, containers
 
 executable reanimate-viewer
   if flag(gtk-viewer)
-    buildable:       True
+    buildable:        True
   else
-    buildable:       False
+    buildable:        False
   main-is:            SvgViewer.hs
   -- other-extensions:
   other-modules:      Reanimate.Arrow