Fix + Clarify apt signing key, mongodb_64bit_version

roles/mongodb/defaults/main.yml

@@ -20,8 +20,11 @@
 # All above are set in: github.com/iiab/iiab/blob/master/vars/default_vars.yml
 # If nec, change them by editing /etc/iiab/local_vars.yml prior to installing!
 
-mongodb_64bit_version: 4.4    # 5.0 also works as of 2022-06-09, but can fail
-                              # on "pre-2011" CPU's that lack AVX.
+mongodb_64bit_version: 4.4    # 5.0 also works as of 2022-06-09, but can fail on
+# "pre-2011" CPU's lacking AVX.  VERIFY both X.Y versions exist (+ work!) below:
+#
+# 1) https://www.mongodb.org/static/pgp/server-X.Y.asc ~= https://pgp.mongodb.com
+# 2) http://repo.mongodb.org/apt/debian &/OR https://repo.mongodb.org/apt/ubuntu
 
 mongodb_conf: /etc/mongod.conf
 mongodb_db_path: "{{ content_base }}/dbdata/mongodb"    # /library/dbdata/mongodb

roles/mongodb/tasks/install.yml

@@ -1,3 +1,8 @@
+# MongoDB Install Docs:
+# https://www.mongodb.com/docs/manual/tutorial/install-mongodb-on-ubuntu/
+# https://www.mongodb.com/docs/manual/installation/
+
+
 # 1. INSTALL MongoDB PACKAGES AND/OR BINARIES
 
 # 2019-02-02: Sugarizer with Node.js 10.x requires MongoDB 2.6+ so
@@ -72,8 +77,9 @@
 # installers for a while now.)  64-bit OS's proceed below.
 
 - block:
-  - name: Add mongodb.org signing key (only 64-bit support available)
-    shell: wget -qO - https://www.mongodb.org/static/pgp/server-5.0.asc | apt-key add -
+  - name: Add mongodb.org signing key (only 64-bit support available) for MongoDB version {{ mongodb_64bit_version }}
+    shell: wget -qO - https://www.mongodb.org/static/pgp/server-{{ mongodb_64bit_version }}.asc | apt-key add -
+    #shell: wget -qO - https://pgp.mongodb.com/server-{{ mongodb_64bit_version }}.asc | apt-key add -
     args:
       warn: false