chore: add docker-build target and enable usage of .env in makefile

.gitignore

@@ -28,3 +28,4 @@ _testmain.go
 *.prof
 
 .DS_Store
+.env

Dockerfile

@@ -6,9 +6,7 @@ COPY go.mod go.sum ./
 RUN go mod download
 COPY . ./
 
-ARG REACHABILITY_OVERRIDE_PUBLIC=false
-
-RUN make binary REACHABILITY_OVERRIDE_PUBLIC=${REACHABILITY_OVERRIDE_PUBLIC}
+RUN make binary
 
 FROM debian:12.4-slim
 

Makefile

@@ -1,3 +1,8 @@
+ifneq (,$(wildcard ./.env))
+	include .env
+	export
+endif
+
 GO ?= go
 GOBIN ?= $$($(GO) env GOPATH)/bin
 GOLANGCI_LINT ?= $(GOBIN)/golangci-lint
@@ -11,6 +16,7 @@ BEELOCAL_BRANCH ?= main
 BEEKEEPER_BRANCH ?= master
 REACHABILITY_OVERRIDE_PUBLIC ?= false
 BATCHFACTOR_OVERRIDE_PUBLIC ?= 5
+IMAGE ?= ethersphere/bee:latest
 
 BEE_API_VERSION ?= "$(shell grep '^  version:' openapi/Swarm.yaml | awk '{print $$2}')"
 
@@ -141,6 +147,10 @@ build: export CGO_ENABLED=0
 build:
 	$(GO) build -trimpath -ldflags "$(LDFLAGS)" ./...
 
+.PHONY: docker-build
+docker-build:
+	docker build -t $(IMAGE) . --no-cache
+
 .PHONY: githooks
 githooks:
 	ln -f -s ../../.githooks/pre-push.bash .git/hooks/pre-push