ci: add files service pipelines

Dockerfile.server

@@ -0,0 +1,15 @@
+FROM golang:1.25-alpine AS build
+
+WORKDIR /src
+ENV GOPRIVATE=gitea.estateliga.work
+RUN apk add --no-cache git
+COPY go.mod go.sum ./
+RUN go mod download
+COPY . .
+RUN CGO_ENABLED=0 GOOS=linux go build -ldflags="-s -w" -o /files-service ./cmd/server
+
+FROM gcr.io/distroless/static-debian12
+COPY --from=build /files-service /files-service
+COPY migrations /migrations
+EXPOSE 3001
+ENTRYPOINT ["/files-service"]