added dockerfile

Dockerfile

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+FROM golang:1.21-alpine as builder
+
+RUN apk update
+RUN apk upgrade
+RUN apk add --no-cache git make
+
+RUN git --version
+
+WORKDIR /work
+
+COPY go.mod .
+COPY . .
+RUN go mod download
+RUN make
+
+FROM alpine:latest
+LABEL maintainer="Thomas von Dein <[email protected]>"
+
+WORKDIR /app
+COPY --from=builder /work/anydb /app/anydb
+
+ENV LANG C.UTF-8
+USER 1001:1001
+
+ENTRYPOINT ["/app/anydb"]
+CMD ["-h"]

docker-compose.yaml

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+version: "3.9"
+services:
+  init:
+    image: alpine:latest
+    user: "root"
+    group_add:
+      - '${GROUP_ID}'
+    volumes:
+      - ${OUTDIR}:/backup
+    command: chown -R ${USER_ID}:${USER_ID} /backup
+
+  anydb:
+    container_name: anydb
+    user: "${USER_ID}:${USER_ID}"
+    volumes:
+      - ${OUTDIR}:/backup
+    working_dir: /backup
+    build: .
+    image: anydb:latest
+    depends_on:
+      init:
+        condition: service_completed_successfully