Created dockerfile and compose

Dockerfile

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+# Dockerfile
+FROM golang:tip-alpine3.22 AS builder
+WORKDIR /app
+# RUN apk add --no-cache git ca-certificates
+COPY go.mod go.sum ./
+RUN go mod download
+COPY . .
+ENV CGO_ENABLED=0 GOOS=linux GOARCH=amd64
+RUN go build -ldflags="-s -w" -o /app/echo .
+
+FROM alpine:3.22
+# RUN apk add --no-cache ca-certificates tzdata && update-ca-certificates
+RUN addgroup -S app && adduser -S app -G app
+USER app
+WORKDIR /app
+COPY --from=builder /app/echo /app/echo
+COPY --from=builder /app/front_files /app/front_files
+# EXPOSE is optional with custom networking, we can keep or remove it as we are using custom network with compose
+EXPOSE 8900
+ENTRYPOINT ["/app/echo"]