Adapt linux build now depending on libssl-dev. Introduce tests job (#45, #46)

native-tls transitive dependency introduced in !41 (merged) depends on libssl-dev package installed for the build to find SSL components.

Switching to "non-slim" Debian image which comes with libssl-dev pre-installed.

Introduce tests job.

Close #45 (closed), #46 (closed) .

.gitlab-ci.yml

@@ -7,7 +7,7 @@ stages:
 
 build_linux:
   stage: build
-  image: rust:slim-buster
+  image: rust:buster
   script:
      # Build the project for Linux
     - cargo build --release
@@ -25,8 +25,6 @@ build_linux:
     paths:
       - target/release
       - target/debian
-  only:
-    - tags
 
 build_macos:
   stage: build
@@ -56,8 +54,6 @@ build_macos:
     key: "$CI_JOB_NAME-$CI_COMMIT_REF_SLUG"
     paths:
       - target/macos
-  only:
-    - tags
 
 release:
   stage: release