Add basic Dockerfile

Dockerfile

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+# syntax=docker/dockerfile:1
+
+FROM golang:1.22 AS build-stage
+WORKDIR /app
+
+# Setup and compile Go
+COPY go.mod go.sum ./
+RUN go mod download
+COPY *.go ./
+RUN CGO_ENABLED=0 GOOS=linux go build -o /hibiscus
+
+FROM alpine:3.19.1 AS deploy-stage
+WORKDIR /
+
+# Bring over the executable
+COPY --from=build-stage /hibiscus /hibiscus
+
+# Copy files
+COPY public public/
+COPY pages pages/
+VOLUME data
+VOLUME config
+
+#USER nonroot:nonroot
+
+EXPOSE 7101
+ENTRYPOINT ["/hibiscus"]