Fixed tests and added CITATION

CITATION.cff

+cff-version: 1.2.0
+title: 'FACT Utils: Docker Julia Client'
+message: >-
+  If you use this software, please cite it using the
+  metadata from this file.
+type: software
+doi: 10.17605/OSF.IO/JWQYT
+authors:
+  - given-names: Riccardo
+    family-names: Boero
+    email: ribo@nilu.no
+    orcid: 'https://orcid.org/0000-0002-7468-9096'
+    affiliation: NILU
+identifiers:
+  - type: doi
+    value: 10.17605/OSF.IO/JWQYT
+    description: This DOI represents all software versions.
+repository-code: 'https://git.nilu.no/fact/utils/DockerJuliaClient'
+url: 'https://osf.io/jwqyt/'
+abstract: >-
+  A lightweight Julia package to communicate with docker engines through Docker Remote API.
+keywords:
+  - Cloud Optimized GeoTIFF
+  - Microservice
+  - Python
+  - Raster
+  - Geo statistics
+license: AGPL-3.0-only

test/runtests.jl

@@ -11,8 +11,13 @@ using JuliaDockerClient
 
     @testset "registry_login Tests" begin
         @testset "registry_login Tests" begin
-            # Testing with mock data
-            encoded_auth = registry_login($REGISTRY_URL, $REGISTRY_USERNAME, $REGISTRY_PASS)
+            # Access environment variables using ENV dictionary
+            registry_url = ENV["REGISTRY_URL"]
+            registry_username = ENV["REGISTRY_USERNAME"]
+            registry_pass = ENV["REGISTRY_PASS"]
+
+            # Testing with environment-provided data
+            encoded_auth = registry_login(registry_url, registry_username, registry_pass)
 
             # Check if the return value is a valid base64-encoded string
             @test typeof(encoded_auth) == String && !isempty(encoded_auth)