PP-6029: Update PaaS manifest

I've updated the Node version to 12.11.1 which is a supported PaaS
version. The Docker image builds successfully with this version.

I simplified the manifest, removing the proxy environment variables
because I think those should be set during the "infrastructure"
provisioning step globally for all apps. Also they're not needed in the
dev environments. I've added a `dev.yml` which just defines dummy values
for some of the variables.

Frontend only uses `CONNECTOR_URL` in tests and does not use
`CONNECTOR_TOKEN_URL` at all.

Also pass in internal urls in their entirety rather than making assumptions
about their structure.

So to push this app to your dev environment:

```
cf push \
  --vars-file dev.yml \
  --var space=dev-yourname \
  --var card_frontend_url=pay-card-frontend-dev-yourname.london.cloudapps.digital
```

PaaS will take care of running `npm install`.

Pair: @vixus0 @mrlumbu

dev.yml

@@ -0,0 +1,4 @@
+memory: 500M
+disk_quota: 500M
+card_frontend_session_encryption_key: asdjhbwefbo23r23rbfik2roiwhefwbqw
+card_connector_analytics_tracking_id: testing-123

manifest.yml

@@ -1,33 +1,23 @@
 ---
 applications:
   - name: card-frontend
-    buildpack: nodejs_buildpack
+    buildpacks:
+      - nodejs_buildpack
     health-check-type: http
     health-check-http-endpoint: '/healthcheck'
     health-check-invocation-timeout: 5
-    memory: 1G
-    disk_quota: 1G
-    command: node start.js
+    memory: ((memory))
+    disk_quota: ((disk_quota))
+    command: npm start
     env:
       NODE_ENV: production
-      http_proxy: ((http_proxy_url))
-      HTTP_PROXY: ((http_proxy_url))
-      HTTP_PROXY_HOST: ((http_proxy_host))
-      HTTP_PROXY_PORT: ((http_proxy_port))
-      https_proxy: ((http_proxy_url))
-      HTTPS_PROXY: ((http_proxy_url))
-      HTTPS_PROXY_HOST: ((http_proxy_host))
-      HTTPS_PROXY_PORT: ((http_proxy_port))
-      HTTP_PROXY_ENABLED: ((http_proxy_enabled))
-      NO_PROXY: ((http_no_proxy))
       SESSION_ENCRYPTION_KEY: ((card_frontend_session_encryption_key))
       COOKIE_MAX_AGE: '5400000'
-      CONNECTOR_TOKEN_URL: http://card-connector-((space)).apps.internal:8080/v1/frontend/tokens/{chargeTokenId}
-      CONNECTOR_URL: http://card-connector-((space)).apps.internal:8080
-      CONNECTOR_HOST: http://card-connector-((space)).apps.internal:8080
+      CONNECTOR_HOST: ((card_connector_url))
       ANALYTICS_TRACKING_ID: ((card_connector_analytics_tracking_id))
-      CARDID_HOST: http://cardid-((space)).apps.internal:8080
+      CARDID_HOST: ((cardid_url))
       NODE_WORKER_COUNT: '1'
       FRONTEND_URL: https://((card_frontend_url))
-      ADMINUSERS_URL: http://adminusers-((space)).apps.internal:8080
-
+      ADMINUSERS_URL: ((adminusers_url))
+    routes:
+      - route: ((card_frontend_url))

package.json

@@ -5,7 +5,7 @@
   "private": true,
   "license": "MIT",
   "engines": {
-    "node": "12.2.0"
+    "node": "12.11.1"
   },
   "standard": {
     "globals": [