add docker tasks

docker/Dockerfile

@@ -0,0 +1,21 @@
+FROM golang:1.24 AS build_image
+
+WORKDIR /usr/src/app
+
+# pre-copy/cache go.mod for pre-downloading dependencies and only redownloading them in subsequent builds if they change
+COPY go.mod go.sum ./
+RUN go mod download && go mod verify
+
+COPY . .
+
+# build binary, place into ./bin/
+RUN CGO_ENABLED=0 GOOS=linux go build -o ./bin/q3rcon-proxy ./cmd/q3rcon-proxy/
+
+FROM scratch AS final_image
+
+WORKDIR /bin/
+
+COPY --from=build_image /usr/src/app/bin/q3rcon-proxy .
+
+# Command to run when starting the container
+ENTRYPOINT [ "./q3rcon-proxy" ]