add config

Dockerfile

@@ -0,0 +1,14 @@
+FROM golang:alpine
+
+WORKDIR /app 
+
+COPY go.mod go.sum ./
+RUN go mod download
+
+COPY . ./
+
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o /api ./cmd/api/main.go
+
+EXPOSE 4000
+
+CMD ["/api"]