chore: add linting (#6)

.github/workflows/pr.yaml

@@ -0,0 +1,28 @@
+name: Pull-Request Testing
+on:
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Build docker image
+      run: docker build .
+
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 2
+      - uses: actions/setup-go@v5
+        with:
+          go-version-file: 'go.mod'
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v6
+        with:
+          version: v1.61.0

.golangci.yaml

@@ -0,0 +1,15 @@
+run:
+  timeout: 30m
+
+linters:
+  enable:
+    - errcheck
+    - gosimple
+    - govet
+    - ineffassign
+    - staticcheck
+    - unused
+    - zerologlint
+
+issues:
+  max-same-issues: 0