server: create dockerfile

.dockerignore

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+server/.env

Dockerfile.server

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+################################################################################
+# App builder stage
+FROM golang:1.26.3-trixie@sha256:0f6b034c99663ea8957e7dae99124e37374cbe7fcb5b5646f19b185f8f976279 AS app-builder
+
+COPY server/ /opt/server
+WORKDIR /opt/server
+
+RUN go get && CGO_ENABLED=0 go build -o out/scannerbot-server
+
+################################################################################
+# Final squashed image
+FROM scratch AS final
+
+# Copy yt-dlp-bot app binary
+COPY --from=app-builder /opt/server/out/scannerbot-server /bin/
+ENTRYPOINT ["/bin/scannerbot-server"]