Updated the FROM lines in the docker file. (#51)

This should make it easier for Dependabot to update them to the correct
version.

Author: kommendorkapten

Dockerfile

@@ -1,14 +1,12 @@
- # 1.25.7-alpine3.23
-FROM golang@sha256:f6751d823c26342f9506c03797d2527668d095b0a15f1862cddb4d927a7a4ced AS builder
+FROM golang:1.25.7-alpine3.23@sha256:f6751d823c26342f9506c03797d2527668d095b0a15f1862cddb4d927a7a4ced AS builder
 
 WORKDIR /app
 COPY go.mod go.sum ./
 RUN go mod download
 COPY . .
 RUN CGO_ENABLED=0 GOOS=linux go build -o deployment-tracker cmd/deployment-tracker/main.go
 
-# v3.23
-FROM alpine@sha256:51183f2cfa6320055da30872f211093f9ff1d3cf06f39a0bdb212314c5dc7375
+FROM alpine:3.23@sha256:51183f2cfa6320055da30872f211093f9ff1d3cf06f39a0bdb212314c5dc7375
 RUN apk --no-cache add ca-certificates
 COPY --from=builder /app/deployment-tracker /deployment-tracker
 ENTRYPOINT ["/deployment-tracker"]