CE spec action was failing for PRs from external forks at the checkout stage. This PR modifies the checkout action to use the full repo name and branch.
#4586
Github action to build and push chatwoot-ce(foss) edition images. This action will run on merges to master, develop and when tags are created. Corresponding docker tags are as follows.
GitHub branch/tag --> docker tag
----
master --> latest-ce
develop ---> develop-ce
v2.3.2 ---> v2.3.2-ce
v* ---> v*-ce
Fixes#4388