add version information to status endpoint, use alpine as base image

.dockerignore

@@ -4,6 +4,5 @@ postalion
 
 LICENSE
 README.md
-.git
 .github
 

Dockerfile

@@ -1,14 +1,19 @@
 FROM golang:1.21-alpine AS build-stage
 
+RUN apk add --no-cache git
+
 WORKDIR /usr/src/app
 
 COPY go.mod go.sum ./
 RUN go mod download
 
 COPY . .
 
-RUN go build -o /app/postalion
+RUN go build -o /app/postalion -v -ldflags="-X 'github.com/denyskon/postalion/version.version=$(git describe)'"
+
+FROM alpine:latest AS build-release-stage
 
+COPY --from=build-stage /app/postalion /app/postalion
 COPY templates /app/templates
 
 VOLUME /app/templates

main.go

@@ -6,10 +6,10 @@ package main
 import (
 	"fmt"
 	"net/http"
-	"runtime/debug"
 
 	mail_services "github.com/denyskon/postalion/email"
 	form_service "github.com/denyskon/postalion/form"
+	"github.com/denyskon/postalion/version"
 	"github.com/go-playground/validator/v10"
 	"github.com/gorilla/pat"
 	"github.com/sirupsen/logrus"
@@ -64,15 +64,8 @@ func main() {
 
 	router.Post("/form/{name}", formHandler)
 	router.Get("/status", func(wr http.ResponseWriter, req *http.Request) {
-		info, ok := debug.ReadBuildInfo()
-		if !ok {
-			log.Error("Failed to read build info")
-			wr.WriteHeader(http.StatusInternalServerError)
-			wr.Write([]byte("Failed to read build info"))
-		}
-
 		wr.WriteHeader(http.StatusOK)
-		wr.Write([]byte(fmt.Sprintf("POSTalion %s", info.Main.Version)))
+		wr.Write([]byte(fmt.Sprintf("POSTalion %s", version.Version())))
 	})
 
 	http.Handle("/", router)

version/version.go

@@ -0,0 +1,7 @@
+package version
+
+var version = "development"
+
+func Version() string {
+	return version
+}