feat/ci: Add main branch matrix

Signed-off-by: SeeuSim <[email protected]>

Author: SeeuSim

.github/workflows/build-docker.yaml

@@ -96,7 +96,7 @@ jobs:
             '{package: $pkg, image: $img, context: $ctx, dockerfile: $dkr, "build-args": $bag}')
           matrix+=("$config")
         fi
-        formatted_matrix=$(echo "[${matrix[*]}]" | jq -c .)
+        formatted_matrix=$(echo "${matrix[@]}" | jq -cs .)
         echo "Outputs Generated: $formatted_matrix"
         echo "matrix=$formatted_matrix" >> $GITHUB_OUTPUT