feat: update dockerfile

Author: xBlaz3kx

build/Dockerfile

@@ -0,0 +1,42 @@
+FROM golang:1.24.3 AS build
+WORKDIR /app/src
+
+ENV GOCACHE=/root/.cache/go-build
+ENV GOMODCACHE=/root/.cache/go-build
+ENV GO111MODULE=on
+ENV CGO_ENABLED=0
+ENV GOOS=linux
+
+# Leverage build cache by copying go.mod and go.sum first
+COPY go.mod go.sum ./
+RUN --mount=type=cache,target=/root/.cache/go-build go mod download
+RUN go mod verify
+
+# Copy the rest of the source code
+COPY . .
+
+RUN --mount=type=cache,target="/root/.cache/go-build" go build -o ./chargeflow ./cmd
+
+FROM debian:buster-slim as app
+
+RUN apt-get update
+
+SHELL ["/bin/sh", "-l", "-c"]
+
+ARG user=app
+ARG group=docker
+RUN addgroup $group
+RUN adduser \
+    --disabled-password \
+    --gecos "" \
+    --ingroup $group \
+    $user
+USER $user
+
+WORKDIR /usr/local/bin
+
+# Copy the binary and set execute permissions
+COPY --chown=$user:$group --from=build /app/chargeflow /usr/local/bin/chargeflow
+RUN chmod +x /usr/local/bin/chargeflow
+
+CMD ["/usr/local/bin/chargeflow"]