add dockerfile with multistage

Dockerfile

@@ -0,0 +1,29 @@
+FROM golang:tip-alpine3.22 AS builder
+COPY . /app
+WORKDIR /app
+RUN apk update --no-cache && apk add --no-cache \
+    && apk add --no-cache make
+
+RUN make build
+
+FROM alpine:3.22.3 AS prod
+
+ARG PROJECT_NAME=learn
+ARG APP_USER=${PROJECT_NAME}_user
+ARG APP_UID=10001
+ARG APP_GID=10001
+
+
+RUN addgroup -g ${APP_GID} ${APP_USER} && \
+    adduser -u ${APP_UID} \
+            -G ${APP_USER} \
+            -S \
+            -H \
+            -D ${APP_USER}
+
+COPY --from=builder /app/bin /srv/${PROJECT_NAME}
+RUN chown -R ${APP_USER}:${APP_USER} /srv/
+USER ${APP_USER}
+WORKDIR /srv/${PROJECT_NAME}
+
+CMD ["./learn"]