build: optimize Dockerfile and update dependencies (#162)

- Update base images to golang:1.20-alpine3.17 and alpine:3.17
- Replace `--update-cache` with `--no-cache` in apk add command
- Specify exact versions for make, git, and bash packages

Signed-off-by: appleboy <appleboy.tw@gmail.com>

Reviewed-on: https://gitea.com/gitea/act_runner/pulls/162
Reviewed-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: appleboy <appleboy.tw@gmail.com>
Co-committed-by: appleboy <appleboy.tw@gmail.com>

.gitea/workflows/test.yml

@@ -1,5 +1,5 @@
 name: checks
-on: 
+on:
   - push
   - pull_request
 
@@ -36,3 +36,7 @@ jobs:
         run: make build
       - name: test
         run: make test
+      - name: dockerfile lint check
+        uses: https://github.com/hadolint/hadolint-action@v3.1.0
+        with:
+          dockerfile: Dockerfile