Remove the usage of docker

.gitignore

@@ -0,0 +1 @@
+.idea

action.yml

@@ -22,6 +22,30 @@ runs:
     - name: Docker login
       shell: sh
       run: |
-        export PREFIXLESS_REGISTRY=$(echo "${{ inputs.registry }}" | sed 's/^https\?:\/\///')
+        export PREFIXLESS_REGISTRY=$(echo -n "${{ inputs.registry }}" | sed 's/^https\?:\/\///')
-        echo "${{ inputs.pass }}" | docker login "$PREFIXLESS_REGISTRY" -u ${{ inputs.user }} --password-stdin
+        
-        echo "DOCKER_CONFIG_BASE64=$(base64 -w 0 < "$HOME/.docker/config.json")" >> $GITEA_ENV
+        echo Checking credentials validity for ${PREFIXLESS_REGISTRY}...
+        export BASE64_AUTH=$(echo -n "${{ inputs.user }}:${{ inputs.pass }}" | base64 -w 0)
+        
+        response=$(curl -s -w "\n%{http_code}" \
+                    -H "Authorization: Basic $BASE64_AUTH" \
+                    -H "User-Agent: Docker-Client/20.10.12 (linux)" \
+                    "https://${PREFIXLESS_REGISTRY}/v2/")
+        
+        http_code=$(echo "$response" | tail -n 1)
+        response_body=$(echo "$response" | head -n -1)
+
+        if [ "$http_code" -eq 200 ]; then
+          echo "Authentication successful"
+        else
+          echo "Authentication failed with HTTP code: $http_code"
+          echo "Response body:"
+          echo "$response_body"
+          if [ "$http_code" -eq 401 ]; then
+            echo "The identifiers are probably wrong"
+          fi
+          exit 1
+        fi
+        
+        echo "Exporting config"
+        echo DOCKER_CONFIG_BASE64=$(echo "{\"auths\": {\"${PREFIXLESS_REGISTRY}\": {\"auth\": \"${BASE64_AUTH}\"}}}" | base64 -w 0) >> $GITEA_ENV