build(docker): drop no-op build flags and use an allowlist ignore

Author: hastefuI

.dockerignore

@@ -1,22 +1,8 @@
-.DS_Store
-.env
-.env.*
-.git
-.gitattributes
-.github
-.gitignore
-.goreleaser.yml
-*_test.go
-*.dll
-*.dylib
-*.exe
-*.gif
-*.log
-*.md
-*.so
-*.tape
-bin/
-dist/
-ffrelayctl
-LICENSE
-Thumbs.db
+*
+!go.mod
+!go.sum
+!main.go
+!api
+!cmd
+!output
+**/*_test.go

Dockerfile

@@ -2,16 +2,16 @@ FROM golang:1.27-alpine AS builder
 
 WORKDIR /build
 
+ARG VERSION=dev
+
 COPY go.mod go.sum ./
 RUN go mod download && go mod verify
 
 COPY . .
 
 RUN CGO_ENABLED=0 GOOS=linux go build \
-    -a \
-    -installsuffix cgo \
-    -ldflags='-w -s -extldflags "-static"' \
     -trimpath \
+    -ldflags="-s -w -X main.version=${VERSION}" \
     -o ffrelayctl .
 
 FROM gcr.io/distroless/static:nonroot