chore: setup boilerplate for particle processor worker

This sets up an example of listening to firestore data and reacting. It
also sets up our first worker in the kubernetes cluster.

go/Dockerfile.particleprocessorworker

@@ -0,0 +1,20 @@
+# golang two stage build
+FROM golang:1.25 AS first-stage
+
+WORKDIR /app
+
+COPY go.mod go.sum ./
+RUN go mod download && go mod verify
+
+COPY . .
+
+WORKDIR /app/cmd/particleprocessorworker
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o main
+RUN ls
+
+FROM alpine:latest AS second-stage
+
+WORKDIR /app
+COPY --from=first-stage /app/cmd/particleprocessorworker .
+RUN echo "copied over binary to production stage"
+CMD ["./main"]