feat: show build commit on admin page

Dockerfile

@@ -1,5 +1,6 @@
 FROM golang:1.26-alpine AS builder
 
+ARG GIT_COMMIT=dev
 
 WORKDIR /app
 
@@ -13,7 +14,7 @@ COPY . .
 ENV CGO_ENABLED=1
 ENV GIN_MODE=release
 
-RUN go build -o app ./cmd/server
+RUN go build -ldflags "-X ResendIt/internal/buildinfo.Commit=${GIT_COMMIT}" -o app ./cmd/server
 
 FROM alpine:latest
 

Jenkinsfile

@@ -40,7 +40,9 @@ pipeline {
 
           sh """
             docker version
-            docker build -t ${IMAGE}:${IMAGE_TAG_SHA} .
+            docker build \
+              --build-arg GIT_COMMIT=${IMAGE_TAG_SHA} \
+              -t ${IMAGE}:${IMAGE_TAG_SHA} .
           """
         }
       }

internal/buildinfo/buildinfo.go

@@ -0,0 +1,7 @@
+package buildinfo
+
+// Commit is the git commit SHA the binary was built from.
+//
+// Set at build time via:
+//   -ldflags "-X ResendIt/internal/buildinfo.Commit=<sha>"
+var Commit = "dev"

internal/web/handler.go

@@ -1,6 +1,7 @@
 package web
 
 import (
+	"ResendIt/internal/buildinfo"
 	"ResendIt/internal/file"
 	"os"
 	"strconv"
@@ -108,9 +109,10 @@ func (h *Handler) AdminPage(c *gin.Context) {
 	totalPages := (totalCount + limit - 1) / limit
 
 	c.HTML(200, "admin.html", gin.H{
-		"Files":      adminFiles,
+		"Files":       adminFiles,
-		"Page":       page,
+		"Page":        page,
-		"TotalPages": totalPages,
+		"TotalPages":  totalPages,
+		"BuildCommit": buildinfo.Commit,
 	})
 }
 

templates/admin.html

@@ -209,6 +209,9 @@
             <div class="text-[12px] font-black uppercase">
                 Data_Density: {{len .Files}} records | Page: {{.Page}}/{{.TotalPages}}
             </div>
+            <div class="text-[11px] font-black uppercase text-gray-600">
+                Build_Commit: {{.BuildCommit}}
+            </div>
         </footer>
     </div>
 </div>