Add CI workflow

.golangci.yml

@@ -0,0 +1,36 @@
+version: "2"
+
+run:
+  timeout: 3m
+
+linters:
+  default: none
+  enable:
+    - errcheck
+    - govet
+    - ineffassign
+    - staticcheck
+    - unused
+  settings:
+    errcheck:
+      check-type-assertions: true
+      check-blank: false
+      exclude-functions:
+        - (io.Closer).Close
+        - (net/http.ResponseWriter).Write
+        - (*encoding/json.Encoder).Encode
+        - io.Copy
+        - fmt.Fprintf
+        - (github.com/jackc/pgx/v5.Tx).Rollback
+        - os.RemoveAll
+    staticcheck:
+      checks: ["all", "-SA1019", "-ST1000", "-ST1005", "-ST1020", "-ST1021", "-ST1022"]
+  exclusions:
+    rules:
+      - path: _test\.go
+        linters:
+          - errcheck
+
+issues:
+  max-issues-per-linter: 0
+  max-same-issues: 0