Updating to alpine 3.10 and crontab-ui version bump 0.3.8

Dockerfile

@@ -12,6 +12,7 @@ RUN   apk --no-cache add \
       wget \
       curl \
       nodejs \
+      npm \
       supervisor
 
 COPY supervisord.conf /etc/supervisord.conf

Makefile

@@ -1,4 +1,4 @@
-VER=0.3.7
+VER=0.3.8
 
 release:
 	sed -i '' "s/version\": \".*/version\": \"$(VER)\",/" package.json

package.json

@@ -1,6 +1,6 @@
 {
   "name": "crontab-ui",
-  "version": "0.3.7",
+  "version": "0.3.8",
   "description": "Easy and safe way to manage your crontab file",
   "main": "index.js",
   "scripts": {