Replace current frontend code with simpler html (#421)

Javascrip Tracker file is renamed to random 8 character string
according to the recommendation in the following page:

https://docs.snowplow.io/docs/sources/trackers/web-trackers/tracker-setup/hosting-the-javascript-tracker/self-hosting-the-javascript-tracker-aws/

Author: spenes

README.md

@@ -74,12 +74,6 @@ Some advice on how to handle certain errors if you're trying to build this local
 
 Your Vagrant version is probably outdated. Use Vagrant 2.0.0+.
 
-### `npm install` results in `enoent ENOENT: no such file or directory, open '/package.json'`
-
-This is caused by trying to use NFS. Comment the relevant lines in `Vagrantfile`.
-
-Most likely this will happen on `TASK [sp_mini_5_build_ui : Install npm packages based on package.json.]` but see also: [https://discourse.snowplowanalytics.com/t/snowplow-mini-local-vagrant/2930](https://discourse.snowplowanalytics.com/t/snowplow-mini-local-vagrant/2930).
-
 ## Topology
 
 Snowplow Mini runs several distinct applications on the same box which are all linked by NSQ topics.  In a production deployment each instance could be an Autoscaling Group and each NSQ topic would be a distinct Kinesis Stream.

provisioning/local_setup.yml

@@ -4,12 +4,10 @@
 
   roles:
     - base
-    - typescript
     - packer
     - sp_mini_1_create_dirs
     - sp_mini_3_build_go_projects
     - sp_mini_4_setup_apps
-    - sp_mini_5_build_ui
     - sp_mini_6_copy_ui_folders
     - sp_mini_7_setup_init
     - docker

provisioning/resources/configs/Caddyfile

@@ -25,7 +25,7 @@
         uri strip_prefix /home
         root * /home/ubuntu/snowplow/ui
         header {
-          Content-Security-Policy "default-src 'self'; script-src 'self' cdn.jsdelivr.net 'unsafe-inline'; frame-ancestors 'none'; style-src 'self' 'unsafe-inline'"
+          Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self'; img-src 'self' data:; connect-src 'self'; font-src 'self'; object-src 'none'; base-uri 'self'; form-action 'self'; frame-ancestors 'none';"
           X-Frame-Options "DENY"
         }
         file_server