don't copy . in Dockerfile

Dockerfile

@@ -2,10 +2,12 @@
 FROM golang:1.19 AS builder
 WORKDIR /wd
 
-COPY go.mod go.sum vendor ./
+COPY vendor ./vendor
+COPY go.mod go.sum ./
 RUN go mod download
 
-COPY . ./
+COPY main.go ./
+COPY pkg ./pkg
 RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o logmower-shippper
 
 FROM alpine