doc: add how to run and dockerfile

Dockerfile

@@ -0,0 +1,21 @@
+FROM docker.io/golang:1.26.1-trixie AS builder
+
+WORKDIR /build
+
+COPY go.mod go.sum .
+
+RUN GOPROXY='https://goproxy.cn,direct' go mod download
+
+COPY cmd ./cmd
+COPY internal ./internal
+
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 \
+        go build -trimpath -ldflags="-s -w" -o /app ./cmd/api
+
+FROM scratch
+WORKDIR /
+
+COPY --from=builder /app /app
+COPY db/ /db
+
+ENTRYPOINT ["/app"]

README.md

@@ -6,6 +6,32 @@ The backend of a bigdata market.
 
 ## Usage
 
-env:
+### env
 - DATABASE_URL  example:"postgres://datamarket:datamarket@localhost:5432/datamarket?sslmode=disable"
-- SERVER_ADDR  default :8080
+- SERVER_ADDR  default :8080
+
+### run
+
+#### docker
+
+use `docker.io/starryskymeow/datamarket-backend:latest`
+
+#### go
+
+```shell
+go run cmd/api/main.go
+```
+
+### db
+
+```shell
+# run a test db, you can use docker instead of podman
+podman run -d \
+  --name datamarket-db-dev \
+  -p 127.0.0.1:5432:5432 \
+  -e POSTGRES_USER=datamarket \
+  -e POSTGRES_PASSWORD=datamarket \
+  -e POSTGRES_DB=datamarket \
+  -v datamarket-db-dev:/var/lib/postgresql/data \
+  docker.io/library/postgres:17
+```