Using discourse user for git clone etc fixed

roles/discourse/tasks/main.yml

@@ -11,10 +11,10 @@
     name: discourse
     system: yes
     state: present
-    shell: /bin/false
-    home: /var/discourse
+    shell: /bin/bash
+    home: /home/discourse
     createhome: true
-    group: discourse
+    groups: discourse,docker
     uid: 1000
 
 - name: Directory for Discourse present
@@ -28,8 +28,8 @@
   git:
     repo: https://github.com/discourse/discourse_docker.git
     dest: /var/discourse
+  become: yes
   become_user: 'discourse' 
-  become_flags: '-s /bin/sh'
 
 - name: Count how much swap is available
   shell: "free -g --si | awk '/^Swap:/{print $2}'"
@@ -101,10 +101,10 @@
   template:
     src: templates/standalone.yml.j2
     dest: /var/discourse/containers/app.yml
+  become: yes
   become_user: discourse 
-  become_flags: '-s /bin/bash'
 
 - name: Rebuild Discourse app
   command: /var/discourse/launcher rebuild app
+  become: yes
   become_user: discourse 
-  become_flags: '-s /bin/bash'