Added yarn dependecies to make file chain

Makefile

@@ -11,7 +11,11 @@ DIST/flowserver: DIST
 	cd go;make
 	cp go/DIST/* DIST/
 
-DIST/web: DIST
+
+browser/vue-flow/node_modules:
+	cd browser/vue-flow; yarn
+
+DIST/web: DIST browser/vue-flow/node_modules
 	mkdir -p DIST/web
 	cd browser/vue-flow;yarn build
 	cp -r browser/vue-flow/dist/* DIST/web

browser/vue-flow/package.json

@@ -25,7 +25,7 @@
     "babel-loader": "^7.1.2",
     "babel-preset-env": "^1.6.0",
     "babel-preset-stage-3": "^6.24.1",
-    "cross-env": "^5.0.5",
+    "cross-env": "^5.1.3",
     "css-loader": "^0.28.7",
     "eslint": "^4.14.0",
     "eslint-config-node": "^2.0.0",

browser/vue-flow/yarn.lock

@@ -1440,7 +1440,7 @@ create-hmac@^1.1.0, create-hmac@^1.1.2, create-hmac@^1.1.4:
     safe-buffer "^5.0.1"
     sha.js "^2.4.8"
 
-cross-env@^5.0.5:
+cross-env@^5.1.3:
   version "5.1.3"
   resolved "https://registry.yarnpkg.com/cross-env/-/cross-env-5.1.3.tgz#f8ae18faac87692b0a8b4d2f7000d4ec3a85dfd7"
   dependencies: