Adding deployment file

Dockerfile

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+# specify the base image to  be used for the application
+FROM golang:1.21.4-alpine
+
+# create the working directory in the image
+WORKDIR /app
+
+# copy Go modules and dependencies to image
+COPY go.mod ./
+
+# download Go modules and dependencies
+RUN go mod download
+
+# copy all the Go files ending with .go extension
+COPY *.go ./
+
+# compile application
+RUN go build -o /golang-http-header
+
+# network port at runtime
+EXPOSE 8000
+
+# execute when the container starts
+CMD [ "/golang-http-header" ]