Rename config vars. Add widget holder template and endpoint to serve it. Add dockerfile

Dockerfile

@@ -0,0 +1,24 @@
+FROM        golang:1.26-alpine3.23 AS build
+
+WORKDIR     /payoutsbuild
+
+RUN         apk add --update --no-cache ca-certificates git
+
+ENV         GOBIN=/payoutsbuild/bin
+
+ADD         . /payoutsbuild
+
+RUN         cd /payoutsbuild && \
+            go mod download && \
+            go build ./cmd/...
+
+FROM        alpine:3.23
+
+WORKDIR     /app
+
+COPY        --from=build /payoutsbuild/payouts /app/
+COPY        --from=build /payoutsbuild/config/payouts.properties /app/
+
+EXPOSE      8080
+
+ENTRYPOINT [ "/app/payouts" ]