Initial FarmCal MVP

Dockerfile

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+FROM golang:1.23-alpine AS build
+WORKDIR /app
+
+COPY go.mod ./
+RUN go mod download
+
+COPY cmd ./cmd
+COPY templates ./templates
+COPY static ./static
+
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o /farmcal ./cmd/server
+
+FROM alpine:3.21
+WORKDIR /app
+
+RUN adduser -D -H appuser
+USER appuser
+
+COPY --from=build /farmcal /app/farmcal
+COPY templates ./templates
+COPY static ./static
+
+EXPOSE 8080
+ENV APP_ADDR=:8080
+
+CMD ["/app/farmcal"]