delve support (#15713)

* delve support

* remove exposed port

* move dlv layer for better caching

GNUmakefile

@@ -4,6 +4,7 @@ COMMIT_SHA ?= $(shell git rev-parse HEAD)
 VERSION = $(shell jq -r '.version' package.json)
 GO_LDFLAGS := $(shell tools/bin/ldflags)
 GOFLAGS = -ldflags "$(GO_LDFLAGS)"
+GCFLAGS = -gcflags "$(GO_GCFLAGS)"
 
 .PHONY: install
 install: install-chainlink-autoinstall ## Install chainlink and all its dependencies.
@@ -38,7 +39,7 @@ docs: ## Install and run pkgsite to view Go docs
 
 .PHONY: install-chainlink
 install-chainlink: operator-ui ## Install the chainlink binary.
-	go install $(GOFLAGS) .
+	go install $(GCFLAGS) $(GOFLAGS) .
 
 .PHONY: install-chainlink-cover
 install-chainlink-cover: operator-ui ## Install the chainlink binary with cover flag.

plugins/chainlink.Dockerfile

@@ -12,12 +12,18 @@ RUN go mod download
 # Env vars needed for chainlink build
 ARG COMMIT_SHA
 
+# Flags for Go Delve debugger
+ARG GO_GCFLAGS
+
 COPY . .
 
 RUN apt-get update && apt-get install -y jq
 
+# Install Delve for debugging
+RUN go install github.com/go-delve/delve/cmd/dlv@latest
+
 # Build the golang binaries
-RUN make install-chainlink
+RUN make GO_GCFLAGS="${GO_GCFLAGS}" install-chainlink
 
 # Install medianpoc binary
 RUN make install-medianpoc
@@ -52,6 +58,7 @@ WORKDIR /chainlink-starknet/relayer
 COPY --from=buildgo /chainlink-starknet/relayer .
 RUN go install ./pkg/chainlink/cmd/chainlink-starknet
 
+
 # Final image: ubuntu with chainlink binary
 FROM ubuntu:20.04
 
@@ -65,6 +72,9 @@ RUN curl https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add - \
   && apt-get update && apt-get install -y postgresql-client-16 \
   && apt-get clean all
 
+# Copy Delve debugger from build stage
+COPY --from=buildgo /go/bin/dlv /usr/local/bin/dlv
+
 COPY --from=buildgo /go/bin/chainlink /usr/local/bin/
 COPY --from=buildgo /go/bin/chainlink-medianpoc /usr/local/bin/
 COPY --from=buildgo /go/bin/chainlink-ocr3-capability /usr/local/bin/