adding dockerfile

mindforge.cronjob/Dockerfile

@@ -0,0 +1,23 @@
+# Start from the official Golang image for building
+FROM --platform=$BUILDPLATFORM golang:1.22-alpine AS builder
+
+ARG TARGETARCH
+ARG TARGETOS
+
+WORKDIR /app
+COPY . .
+# Build statically for Linux
+RUN CGO_ENABLED=0 GOOS=${TARGETOS} GOARCH=${TARGETARCH} go build -o mindforge-cronjob main.go
+
+# Use Alpine for running, with CA certificates for TLS
+FROM alpine:latest
+WORKDIR /app
+RUN apk --no-cache add ca-certificates
+COPY --from=builder /app/mindforge-cronjob .
+ENV GIT_REPOSITORY=""
+ENV GEMINI_API_KEY=""
+ENV OPENAI_API_KEY=""
+ENV DISCORD_WEBHOOK_URL=""
+ENV HAVEN_NOTIFY_URL=""
+ENV SSH_PRIVATE_KEY=""
+ENTRYPOINT ["/app/mindforge-cronjob"]