ansible: install from Debian repository, not third party APT repositories

* nginx
* nodejs and npm
* postgresql

ansible/roles/nginx/tasks/main.yml

@@ -1,12 +1,4 @@
 ---
-- name: Add APT key for nginx repository
-  apt_key:
-    url: https://nginx.org/keys/nginx_signing.key
-
-- name: Add nginx APT repository
-  apt_repository:
-    repo: deb http://nginx.org/packages/debian/ buster nginx
-
 - name: Install nginx
   apt:
     name: nginx

ansible/roles/nodejs/tasks/main.yml

@@ -1,15 +1,9 @@
 ---
-- name: Add APT key for NodeSource Node.js repository
-  apt_key:
-    url: https://deb.nodesource.com/gpgkey/nodesource.gpg.key
-
-- name: Add NodeSource Node.js APT repository
-  apt_repository:
-    repo: deb https://deb.nodesource.com/node_14.x buster main
-
 - name: Install Node.js
   apt:
-    name: nodejs
+    name:
+      - nodejs
+      - npm
 
 - name: Install npm packages defined in package.json
   become_user: "{{ app_username }}"

ansible/roles/postgresql/tasks/main.yml

@@ -1,12 +1,4 @@
 ---
-- name: Add APT key for PostgreSQL repository
-  apt_key:
-    url: https://www.postgresql.org/media/keys/ACCC4CF8.asc
-
-- name: Add PostgreSQL APT repository
-  apt_repository:
-    repo: deb http://apt.postgresql.org/pub/repos/apt buster-pgdg main
-
 - name: Install PostgreSQL
   apt:
     name: postgresql-{{ postgresql_version }}