Added "worker.dir" to config. Fixes #721 (#723)

bin/config.json

@@ -9,7 +9,8 @@
     "cache": {
         "useBlob": true,
         "dir": "~/.deepforge/worker/cache"
-    }
+    },
+    "dir": "~/.deepforge/worker"
   },
   "mongo": {
     "dir": "~/.deepforge/data"

bin/envConfig.json

@@ -1,5 +1,6 @@
 {
     "DEEPFORGE_BLOB_DIR": "blob.dir",
     "DEEPFORGE_WORKER_CACHE": "worker.cache.dir",
+    "DEEPFORGE_WORKER_DIR": "worker.dir",
     "DEEPFORGE_WORKER_USE_BLOB": "worker.cache.useBlob"
 }

bin/start-worker.js

@@ -9,7 +9,7 @@ var path = require('path'),
     executorSrc = path.join(__dirname, '..', 'node_modules', 'webgme', 'src',
         'server', 'middleware', 'executor', 'worker'),
     id = Date.now(),
-    workerRootPath = path.join(__dirname, '..', 'src', 'worker'),
+    workerRootPath = process.env.DEEPFORGE_WORKER_DIR || path.join(__dirname, '..', 'src', 'worker'),
     workerPath = path.join(workerRootPath, `worker_${id}`),
     workerConfigPath =  path.join(workerPath, 'config.json'),
     workerTmp = path.join(workerPath, 'tmp'),