diff --git a/docker/builder/Dockerfile b/docker/builder/Dockerfile
index a0034cb..6e71753 100644
--- a/docker/builder/Dockerfile
+++ b/docker/builder/Dockerfile
@@ -9,8 +9,9 @@ RUN apt-get update --allow-releaseinfo-change && \
 
 # RUN go mod download
 ENV GOPATH="/go"
+VOLUME [ "/go" ]
 
-# Install protoc-gen-go + protoc-gen-micro
-RUN cd /tmp; go install google.golang.org/protobuf/cmd/protoc-gen-go@v1.28; go install github.com/go-micro/generator/cmd/protoc-gen-micro@v1.0.0
+COPY ./scripts /scripts
 
-COPY ./scripts /scripts
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+COPY ./docker-entrypoint.sh /
+ENTRYPOINT [ "/docker-entrypoint.sh" ]
\ No newline at end of file
diff --git a/docker/builder/docker-entrypoint.sh b/docker/builder/docker-entrypoint.sh
new file mode 100755
index 0000000..f971254
--- /dev/null
+++ b/docker/builder/docker-entrypoint.sh
@@ -0,0 +1,9 @@
+#!/bin/bash
+
+if [[ ! -x /go/bin/protoc-gen-micro ]]; then
+    cd /tmp
+    go install google.golang.org/protobuf/cmd/protoc-gen-go@v1.28
+    go install github.com/go-micro/generator/cmd/protoc-gen-micro@v1.0.0
+fi
+
+exec "$@"
\ No newline at end of file