Merge pull request #43 from TykTechnologies/update-docker-file

create new dockerfile, 53mb large, tested with helm chart

docker/controller/Dockerfile

@@ -1,8 +1,31 @@
-FROM centos
+# Start from the latest golang base image
+FROM golang:1.13 as builder
 
-RUN mkdir -p /opt/tyk-k8s
-COPY files/build/tyk-k8s /opt/tyk-k8s/tyk-k8s
+# Set the Current Working Directory inside the container
+WORKDIR /app
+
+# Copy go mod and sum files
+COPY go.mod go.sum ./
+
+# Download all dependencies. Dependencies will be cached if the go.mod and go.sum files are not changed
+RUN go mod download
+
+# Copy the source from the current directory to the Working Directory inside the container
+COPY . .
+
+# Build the Go app
+RUN CGO_ENABLED=0 go build -o tyk-k8s .
 
+
+######## Start a new stage from scratch #######
+FROM debian:buster-slim
+
+RUN mkdir -p /opt/tyk-k8s
 WORKDIR /opt/tyk-k8s
 
-CMD ["/opt/goproxy/tyk-k8s", "start"]
+# Copy the Pre-built binary file from the previous stage
+COPY --from=builder /app/tyk-k8s /opt/tyk-k8s/tyk-k8s
+
+ENTRYPOINT ["./tyk-k8s"]
+
+CMD ["start"]