create tests directory format

backend/Dockerfile

@@ -1,25 +0,0 @@
-FROM golang:1.24-alpine AS builder
-
-WORKDIR /app
-
-COPY go.mod go.sum ./
-RUN go mod download
-
-COPY . .
-
-RUN CGO_ENABLED=0 GOOS=linux go build -o /bin/server ./cmd/server
-
-FROM alpine:3.21
-
-RUN apk add --no-cache ca-certificates curl libreoffice-core poppler-utils
-
-WORKDIR /app
-
-COPY --from=builder /bin/server .
-COPY internal/db/migrations ./internal/db/migrations
-
-RUN mkdir -p /app/uploads /app/uploads/thumbnails /data
-
-EXPOSE 8080
-
-CMD ["./server"]