Update from source build.
diff --git a/core/typescript37Action/Dockerfile b/core/typescript37Action/Dockerfile
index 4b5b0c4..29cc334 100644
--- a/core/typescript37Action/Dockerfile
+++ b/core/typescript37Action/Dockerfile
@@ -15,12 +15,28 @@
# limitations under the License.
#
-FROM golang:1.12 as builder
-RUN env CGO_ENABLED=0 go get github.com/apache/openwhisk-runtime-go/main \
- && mv /go/bin/main /bin/proxy
+# build go proxy from source
+FROM golang:1.15 AS builder_source
+ARG GO_PROXY_GITHUB_USER=apache
+ARG GO_PROXY_GITHUB_BRANCH=master
+RUN git clone --branch ${GO_PROXY_GITHUB_BRANCH} \
+ https://github.com/${GO_PROXY_GITHUB_USER}/openwhisk-runtime-go /src ;\
+ cd /src ; env GO111MODULE=on CGO_ENABLED=0 go build main/proxy.go && \
+ mv proxy /bin/proxy
+
+# or build it from a release
+FROM golang:1.15 AS builder_release
+ARG GO_PROXY_RELEASE_VERSION=1.15@1.17.0
+RUN curl -sL \
+ https://github.com/apache/openwhisk-runtime-go/archive/{$GO_PROXY_RELEASE_VERSION}.tar.gz\
+ | tar xzf -\
+ && cd openwhisk-runtime-go-*/main\
+ && GO111MODULE=on go build -o /bin/proxy
FROM node:12.1.0-stretch
-COPY --from=builder /bin/proxy /bin/proxy
+
+# select the builder to use
+ARG GO_PROXY_BUILD_FROM=release
ENV TYPESCRIPT_VERSION=3.7.4
ENV OW_COMPILER=/bin/compile
@@ -37,6 +53,11 @@
&& rm -rf /var/lib/apt/lists/* &&\
mkdir -p /app/action
+WORKDIR /proxy
+COPY --from=builder_source /bin/proxy /bin/proxy_source
+COPY --from=builder_release /bin/proxy /bin/proxy_release
+RUN mv /bin/proxy_${GO_PROXY_BUILD_FROM} /bin/proxy
+
# Add sources and copy the package.json to root container,
# so npm packages from user functions take precendence.
#
