Add Docker image files.

.dockerignore

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+# Compiled Object files, Static and Dynamic libs (Shared Objects)
+*.o
+*.a
+*.so
+*.syso
+
+# Folders
+_obj
+_test
+
+# Architecture specific extensions/prefixes
+*.[568vq]
+[568vq].out
+
+*.cgo1.go
+*.cgo2.c
+_cgo_defun.c
+_cgo_gotypes.go
+_cgo_export.*
+
+_testmain.go
+
+*.exe
+*.test
+*.prof
+
+###
+
+*Docker*
+*.docker*
+
+#Jenkinsfile
+#.github/*

Dockerfile

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+FROM golang:1.18-alpine AS build
+
+WORKDIR /usr/src/icecon
+COPY go.mod go.sum ./
+RUN go mod download
+COPY * .
+RUN go generate -v ./...
+RUN go build -v -ldflags "-s -w" .
+
+###
+
+FROM alpine:3.15
+
+COPY --from=build /usr/src/icecon/icecon /usr/local/bin
+
+STOPSIGNAL SIGTERM
+ENTRYPOINT ["/usr/local/bin/icecon"]