Install the build directory as the production root

The previous approach was to sync selected folders from the checkout
root but otherwise keep their location intact. The new approach works
out of the build directory, removing an unnecessary level of directory
hierarchy.

ansible/install.yml

@@ -1,8 +1,9 @@
 ---
-- hosts: all
+- hosts: notifier
   vars:
     application_user: notifier
-    installation_directory: /srv/notifier-prod
+    application_group: notifier
+    installation_directory: /srv/notifier
     nodejs_path: /usr/local/bin/node
   tasks:
   - name: Create the application user
@@ -16,23 +17,43 @@
       shell="/usr/sbin/nologin"
       system=yes
 
-  - name: Create the log directory
-    become: true
-    file:
-      path: "/var/log/notifier"
-      state: directory
-      owner: "{{ application_user }}"
-      group: "{{ application_user }}"
-      mode: 0700
-
   - name: Rsync the application
     become: true
-    become_user: "{{ application_user }}"
     synchronize:
-      archive: yes
-      src: "../notifier/"
+      src: "../build/"
       dest: "{{ installation_directory }}"
       delete: yes
+      recursive: true
+      rsync_opts:
+        - "--exclude=node_modules"
+        - "--exclude=package.json"
+        - "--exclude=package-lock.json"
+
+  - name: Copy package.json
+    become: true
+    copy:
+      src: "{{ item }}"
+      dest: "{{ installation_directory }}"
+    with_items:
+      - ../package.json
+      - ../package-lock.json
+
+  - name: Install NPM packages
+    become: true
+    npm:
+      executable: "/usr/local/bin/npm"
+      global: no
+      ignore_scripts: yes
+      path: "{{ installation_directory }}"
+      production: yes
+
+  - name: Set permissions on application root
+    become: true
+    file:
+      path: "{{ installation_directory }}"
+      recurse: yes
+      owner: "{{ application_user }}"
+      group: "{{ application_group }}"
 
   - name: Populate the systemd service
     become: true

ansible/templates/notifer.service.j2

@@ -8,7 +8,7 @@ NotifyAccess=all
 User=notifier
 Group=notifier
 WorkingDirectory={{ installation_directory }}
-ExecStart={{ nodejs_path }} build/server/server.js
+ExecStart={{ nodejs_path }} server/server.js
 Environment=NODE_ENV=production
 
 [Install]