chore(deps): update dependency go to 1.26

.github/workflows/test.yml

@@ -28,7 +28,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v4
         with:
-          go-version: '1.20'
+          go-version: '1.26'
 
       - name: Build
         run: |

Dockerfile

@@ -9,7 +9,7 @@ COPY frontend/ ./
 RUN pnpm build
 
 # backend
-FROM golang:1.26-alpine as backend
+FROM golang:1.20-alpine as backend
 WORKDIR /app
 COPY . .
 RUN rm -rf frontend