infra: Add scripts for deploying the frontend

infra/deployment/config/xsnexplorer.io

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+server {
+  listen 80 default_server;
+
+  root /var/www/html;
+
+  index index.html;
+
+  server_name xsnexplorer.io;
+
+  # the backend api
+  location /api/ltc {
+    rewrite ^/api/ltc/(.*) /$1 break;
+    proxy_pass http://18.222.26.185:9000;
+  }
+
+  location /api/xsn {
+    rewrite ^/api/xsn/(.*) /$1 break;
+    proxy_pass http://18.224.5.222:9000;
+  }
+
+  location /api {
+    rewrite ^/api/(.*) /$1 break;
+    proxy_pass http://18.224.5.222:9000;
+  }
+
+  # caching static assets
+  location ~* \.(jpg|jpeg|png|gif|ico|css|js)$ {
+    expires 7d;
+  }
+
+  location / {
+    try_files $uri $uri/ /index.html;
+  }
+}

infra/deployment/frontend.yml

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+---
+- hosts: frontend
+  gather_facts: no
+  roles:
+    - ubuntu-16-04
+
+  tasks:
+    - name: Install nginx
+      become: yes
+      apt:
+        name: nginx
+        state: latest
+        update_cache: yes
+
+    - name: Disable nginx default site
+      become: yes
+      file:
+        path: /etc/nginx/sites-enabled/default
+        state: absent
+
+    - name: Remove nginx default site config
+      become: yes
+      file:
+        path: /etc/nginx/sites-available/default
+        state: absent
+
+    - name: Create nginx log directory
+      become: yes
+      file:
+        path: /var/log/nginx
+        state: directory
+
+    - name: Copy the nginx config
+      become: yes
+      copy:
+        src: config/xsnexplorer.io
+        dest: /etc/nginx/sites-available/xsnexplorer
+
+    - name: Create the symlink
+      become: yes
+      file:
+        src: /etc/nginx/sites-available/xsnexplorer
+        dest: /etc/nginx/sites-enabled/xsnexplorer
+        state: link
+
+    - name: Restart nginx
+      become: yes
+      service:
+        name: nginx
+        state: restarted
+
+    - name: Enable nginx to run on system startup
+      become: yes
+      systemd:
+        name: nginx
+        enabled: yes
+
+    - name: Build the application
+      shell: ./scripts/build-web-ui.sh
+      delegate_to: 127.0.0.1
+
+    - name: Upload the application
+      synchronize:
+        src: web.zip
+        dest: web.zip
+
+    - name: Create the web data directory
+      become: yes
+      file:
+        path: /var/www/html
+        state: directory
+        owner: www-data
+        group: www-data
+
+    - name: Unpack the application
+      become: yes
+      unarchive:
+        remote_src: yes
+        src: web.zip
+        dest: /var/www/html
+
+    - name: Move the web content
+      become: yes
+      raw: rsync -a /var/www/html/dist/ /var/www/html/ --remove-source-files
+
+    - name: Set the permissions
+      become: yes
+      file:
+        dest: /var/www/html
+        owner: www-data
+        group: www-data
+        recurse: yes

infra/deployment/production-frontend.ini

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+[frontend]
+explorer-frontend

infra/deployment/scripts/build-web-ui.sh

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+#!/bin/bash
+set -e
+cd ../../web-ui/ && ng build --prod && zip -r web.zip dist/* && cd -
+mv ../../web-ui/web.zip web.zip