Modify ci to archive artifacts

.gitea/workflows/ci.yml

@@ -5,6 +5,11 @@ jobs:
     build:
         runs-on: ubuntu-latest
         steps:
-            - uses: actions/checkout@v2
+            - uses: actions/checkout@v4
             - name: build using gcc
-              run: gcc -Wall -Werror main.c
+              run: gcc -Wall -Werror main.c -o program
+            - name: Archive production artifacts
+              uses: actions/upload-artifact@v3
+              with:
+                  name: program
+                  path: program