infra: Add script to deploy the xsn-backend

infra/deployment/config/xsn-backend.env

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infra/deployment/scripts/build-server.sh

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+#!/bin/bash
+set -e
+cd ../../server/ && sbt dist && cd -
+cp ../../server/target/universal/xsn-block-explorer-0.1.0-SNAPSHOT.zip app.zip

infra/deployment/systemd-services/xsn-backend.service

@@ -0,0 +1,15 @@
+[Unit]
+Description=XSN Backend Server
+
+[Service]
+Type=simple
+WorkingDirectory=/home/play/app/xsn-block-explorer-0.1.0-SNAPSHOT
+StandardOutput=tty
+StandardError=tty
+EnvironmentFile=/home/play/app/.env
+User=play
+ExecStart=/home/play/app/xsn-block-explorer-0.1.0-SNAPSHOT/bin/xsn-block-explorer -Dhttp.port=9000 -Dpidfile.path=/dev/null
+Restart=on-failure
+
+[Install]
+WantedBy=multi-user.target

infra/deployment/xsn-backend.yml

@@ -0,0 +1,88 @@
+---
+- hosts: server
+  gather_facts: no
+  roles:
+    - ubuntu-16-04
+    - java8-oracle
+
+  tasks:
+    - name: Build the application
+      shell: ./scripts/build-server.sh
+      delegate_to: 127.0.0.1
+
+    - name: Upload the application
+      synchronize:
+        src: app.zip
+        dest: app.zip
+
+    - name: Create the play group
+      become: yes
+      group:
+        name: play
+        state: present
+
+    - name: Create the play user
+      become: yes
+      user:
+        name: play
+        group: play
+        state: present
+        system: yes
+
+    - name: Create the app directory
+      become: yes
+      file:
+        path: /home/play/app
+        state: directory
+        owner: play
+        group: play
+
+    - name: Unpack the application
+      become: yes
+      unarchive:
+        remote_src: yes
+        src: app.zip
+        dest: /home/play/app
+        owner: play
+        group: play
+
+    - name: Set the application config
+      become: yes
+      copy:
+        src: config/xsn-backend.env
+        dest: /home/play/app/.env
+        owner: play
+        group: play
+
+    - name: Set the application files permissions
+      become: yes
+      file:
+        dest: /home/play/app
+        owner: play
+        group: play
+        recurse: yes
+
+    - name: Add the systemd service
+      become: yes
+      copy:
+        src: systemd-services/xsn-backend.service
+        dest: /etc/systemd/system/
+        owner: root
+        group: root
+
+    - name: Pick up systemd changes
+      become: yes
+      systemd:
+        daemon_reload: yes
+
+    - name: Restart the application
+      become: yes
+      systemd:
+        name: xsn-backend
+        state: restarted
+
+    - name: Enable the application to run on system startup
+      become: yes
+      systemd:
+        name: xsn-backend
+        enabled: yes