Adding variables pr 1.x (#111)

* Fixing ce_provision vars in container builds.

* Fixing ce_deploy vars in container builds.

* Adding the option to build manually the containers.

* Still missing some vars.

* Setting older version of Ubuntu for containers.

Author: gregharvey

.github/workflows/ce-dev-PR-test.yml

@@ -5,7 +5,7 @@ on: pull_request
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v2
       - name: Install modules

.github/workflows/ce-dev-build.yml

@@ -11,7 +11,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v2
       - name: Install modules

.github/workflows/ce-dev-test.yml

@@ -7,7 +7,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v2
         with: