ci: fix incorrect image building

Dockerfile

@@ -1,5 +1,5 @@
-FROM golang:1.12-alpine as builder
-
+FROM golang:1.13-alpine as builder
+ENV GO111MODULE=on
 # Remove the cache to avoid warning message during `apk info`
 RUN rm -rf /var/cache/apk/* && \
     rm -rf /tmp/*
@@ -9,10 +9,9 @@ RUN apk update
 # GO and PATH env variables already set in golang image
 # to reduce download time
 RUN apk --no-cache add -U make git musl-dev gcc
-
+WORKDIR /app
 COPY . .
-
-RUN GO111MODULE=on make local-build
+RUN make local-build
 
 # final stage
 FROM alpine:3.7

Makefile

@@ -35,7 +35,7 @@ clean: local-clean ## Clean your generated files
 .PHONY: local-build
 local-build: local-clean local-format ## Build locally the binary
 	@echo "+ $@"
-	GO111MODULE=on go build -o $(GO)/bin/$(BIN_NAME) .
+	go build -o $(GO)/bin/$(BIN_NAME) .
 
 .PHONY: local-clean
 local-clean: ## Cleanup locally any build binaries or packages
@@ -100,6 +100,6 @@ bdd-test: local-run-app
 	go get github.com/DATA-DOG/godog/cmd/godog
 	DB_PORT=`docker-compose -p $(DOCKER_IMAGE_NAME)-uuid -f containers/docker-compose.yml port database 5432  | cut -f2 -d':'`;
 	API_PORT=`docker-compose -p $(DOCKER_IMAGE_NAME)-uuid -f containers/docker-compose.yml port api 8080  | cut -f2 -d':'`;
-	$GOPATH/bin/godog
+	$(GOPATH)/bin/godog