dockerfile: optimize dockerfile (#49559)

close #49071

.dockerignore

@@ -1,4 +1,3 @@
-.git/
 bazel-bin/
 bazel-out/
 bazel-tidb/

Dockerfile

@@ -12,23 +12,20 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# The current dockerfile is only used for development purposes. If used in a 
+# production environment, please refer to https://github.com/PingCAP-QE/artifacts/blob/main/dockerfiles/cd/builders/tidb/Dockerfile.
+
 # Builder image
-FROM rockylinux:9 as builder
-
-ENV GOLANG_VERSION 1.21.5
-ENV ARCH amd64
-ENV GOLANG_DOWNLOAD_URL https://dl.google.com/go/go$GOLANG_VERSION.linux-$ARCH.tar.gz
-ENV GOPATH /go
-ENV GOROOT /usr/local/go
-ENV PATH $GOPATH/bin:$GOROOT/bin:$PATH
-RUN yum update -y && yum groupinstall 'Development Tools' -y \
-    && curl -fsSL "$GOLANG_DOWNLOAD_URL" -o golang.tar.gz \
-	&& tar -C /usr/local -xzf golang.tar.gz \
-	&& rm golang.tar.gz
-
-COPY . /tidb
+FROM golang:1.21 as builder
+WORKDIR /tidb
+
+COPY . .
+
 ARG GOPROXY
-RUN export GOPROXY=${GOPROXY} && cd /tidb && make server
+ENV GOPROXY ${GOPROXY}
+
+RUN make server
+
 
 FROM rockylinux:9-minimal
 

Dockerfile.enterprise

@@ -12,23 +12,17 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# The current dockerfile is only used for development purposes.
 # Builder image
-FROM rockylinux:9 as builder
+FROM golang:1.21 as builder
+WORKDIR /tidb
 
-ENV GOLANG_VERSION 1.21.5
-ENV ARCH amd64
-ENV GOLANG_DOWNLOAD_URL https://dl.google.com/go/go$GOLANG_VERSION.linux-$ARCH.tar.gz
-ENV GOPATH /go
-ENV GOROOT /usr/local/go
-ENV PATH $GOPATH/bin:$GOROOT/bin:$PATH
-RUN yum update -y && yum groupinstall 'Development Tools' -y \
-    && curl -fsSL "$GOLANG_DOWNLOAD_URL" -o golang.tar.gz \
-	&& tar -C /usr/local -xzf golang.tar.gz \
-	&& rm golang.tar.gz
+COPY . .
 
-COPY . /tidb
 ARG GOPROXY
-RUN export GOPROXY=${GOPROXY} && cd /tidb && make enterprise-server-build
+ENV GOPROXY ${GOPROXY}
+
+RUN make enterprise-server-build
 
 FROM rockylinux:9-minimal